Questions on Algebra: Sequences of numbers, series and how to sum them answered by real tutors!

Tutors Answer Your Questions about Sequences-and-series (FREE)

Question 1080684: If W,X,Y,Z are the first four terms of an arithemetic sequence , express y in term's of W,X and Z
Click here to see answer by ikleyn(52788)

Question 1080712: without nesessary expanding find the term tha does not contain valiable x in the expansion of (3x^2-1/4x)^6
Click here to see answer by MathTherapy(10552)

Question 1080872: what is the next number for this pattern? 78 6
Click here to see answer by Alan3354(69443)

Question 1080865: an = -2n+3
Click here to see answer by Fombitz(32388)

Question 1080886: Given the arithmetic progression ;3,8,13...Find the least number of terms whose sum is greater than 80..

Click here to see answer by Boreal(15235)

Question 1080880: the 3rd,5th and 8th terms of a n arithmetical progression are 3x+8,x+24,x^3+15 respectively .Find the value of x and common difference

Click here to see answer by Boreal(15235)

Question 1080940: The 3rd,5th and 8thterma of an Arithmetic progression are 3x+8,x+24 and x^3+15 respectively.
Find the value of x and common difference.

Click here to see answer by josgarithmetic(39618)

Question 1080884: An amount of shs 2000 is invested at an interest if 5% per month. If shs 200 is added at the beginning of each successive month but with no withdraws,
1.Give an expression for the value accumulated after n months.
2.After how many months will the amount have accumulated first exceed shs. 42000?

Click here to see answer by Boreal(15235)

Question 1081220: The recursive rule for a sequence is shown.
an=an-1 +6
a1= 39
What is the explicit rule for this sequence?
Click here to see answer by Fombitz(32388)

Question 1081256: A minor league baseball team plays 129

games in a season. If the team won 17

more than three times

as many games as they lost, how many wins and losses did the team have?
Click here to see answer by addingup(3677)

Question 1081427: plz help me solve this: Gp has 6 and 24 as its 2nd and 4rh terms respectively, now I need the first four terms
Click here to see answer by Boreal(15235)

Question 1081427: plz help me solve this: Gp has 6 and 24 as its 2nd and 4rh terms respectively, now I need the first four terms
Click here to see answer by MathTherapy(10552)

Question 1080828: How to write the series 1/2+2/3+3/4+4/5+5/6 in summative notation?
Click here to see answer by Edwin McCravy(20056)

Question 1079881: 8,9.4,13.6,26.2,64,__ How to solve this question please can you help me ..
Click here to see answer by Edwin McCravy(20056)

Question 1079633: Hi , ive been stuck on this problem I've found online and I just can't crack it.
I was given a sequence :
8,0,8,16,24,16,1, -whats the next number?
The awnser to this is 40, but Im clueless as to why . I would be verry happy if you could help me with this.
Thank you !
Hadar
Click here to see answer by Edwin McCravy(20056)

Question 1081532: express 7+13+19+...+61 using sigma notation
Click here to see answer by jim_thompson5910(35256)

Question 1081527: when Lisa was born, her parents decided to put $250 times her age away for her at every birthday through her 18th birthday. This money will help Lisa go to college. How much money will they have saved after her 18th birthday (do not take into account any interest earned)?
Click here to see answer by chen(11)

Question 1081531: express 3-6+12-24+ using sigma notation
Click here to see answer by math_helper(2461)

Question 1081526: 1/3^10 + 1/3^8 + 1/3^6 +...
determine whether each series is convergent or divergent. if it is convergent, find its sum
Click here to see answer by Fombitz(32388)

Question 1081594: Write a recursive formula for the squence 8, 10, 12, 14, 16 then find the next term
Click here to see answer by math_helper(2461)

Question 1081597: Is the squence geometric? If so identify the common ratio 6,12, 24, 48,....
Click here to see answer by amfagge92(93)

Question 1081597: Is the squence geometric? If so identify the common ratio 6,12, 24, 48,....
Click here to see answer by Alan3354(69443)

Question 1081593: Write a recursive rule for the squence -2, 4, -8, 16
Click here to see answer by math_helper(2461)

Question 1081598: Is the squence arithmetic? If so identify the common difference. 14, 21, 42, 77

Click here to see answer by amfagge92(93)

Question 1081596: Is the squence geometric? If so identify the common ratio 2, -4, -16, -36, ...
Click here to see answer by Edwin McCravy(20056)

Question 1081636: a1=2/5;an=5an−1
an=?

I would dearly love if you can answer in less than a 5 hours please and thanks veryy much!!
Click here to see answer by stanbon(75887)

Question 1081636: a1=2/5;an=5an−1
an=?

I would dearly love if you can answer in less than a 5 hours please and thanks veryy much!!
Click here to see answer by MathTherapy(10552)

Question 1081636: a1=2/5;an=5an−1
an=?

I would dearly love if you can answer in less than a 5 hours please and thanks veryy much!!
Click here to see answer by ikleyn(52788)

Question 1081635: a1=25;an=5an−1
an=?

I would dearly love if you can answer in less than a 5 hours please and thanks veryy much!!
Click here to see answer by solver91311(24713)

Question 1081650: (1+1/2)(1+1/4)(1+1/16)(1+1/256).........
Click here to see answer by ikleyn(52788)

Question 1081833: Hey!
I'm trying to figure out what the general formula is based on the following sequence: {2/3, -3/5, 4/7, -5/9}
So I believe that the numerator is something like (n+1) but I can't for the life of me figure out the bottom or the negatives..
Thanks!

Click here to see answer by josgarithmetic(39618)

Question 1081859: The first term of G.P is 1�2 and r=2�3 find the 9th term
Click here to see answer by Fombitz(32388)

Question 1081858: The first term of G.P is 1�2and r=2�3 find the 9 term
Click here to see answer by Fombitz(32388)

Question 1081924: WHAT IS THE NEXT LETTER?
A F Z U G L T

Click here to see answer by MathLover1(20850)

Question 1081930: Hi I would like to know how to do this problem:
What is the sum of all the integers between square root of 19 and square root of 77.
Thanks so much
Click here to see answer by Alan3354(69443)

Question 1081942: The side lengths of a quadrilateral produce an arithmetic sequence. If the longest side
has a length of 24 cm and the perimeter is 60 cm, what are the other side lengths?
Explain your reasoning.
Click here to see answer by ikleyn(52788)

Question 1081992: It takes 4 years for light from Sirius, a near neighbouring star to reach earth. The speed of light is 2.998 X 10^8 ms-1 How far away from Earth is Sirius? Give your answer in Km correct to 3 significant figures
Click here to see answer by Alan3354(69443)

Question 1081943: A pipe and sprinkler system is attached to a motor-driven wheel
that moves the irrigation system in a circle over a
field. The first wheel is attached 50 m from
the pivot point, and all the other wheels
are attached at 20-m intervals further along
the pipe. Determine the circumference of
the circle traversed by wheel 12.
Click here to see answer by Alan3354(69443)

Question 1082118: Use differences to find a pattern in the sequence. -1,-4,-10,-11,-1, 26,76. Assuming that the pattern continues, the eighth term should be
I cannot figure out how to work this problem. Please help.
Click here to see answer by solver91311(24713)

Question 1082123: what is the sum of the series 7+22+37...+292?
Click here to see answer by Boreal(15235)

Question 1082123: what is the sum of the series 7+22+37...+292?
Click here to see answer by solver91311(24713)

Question 1082154: Given the arithmetic sequence 8, 5, 2... find S20.
Click here to see answer by ikleyn(52788)

Question 1082361: A field house has a section where the seating can be arranged so the first row has 9 seats, the second row has 11 seats, the third row has 13 seats and so on. If there is sufficient space for 26 rows in the section, how many seats are in the last row of the section?
Click here to see answer by ikleyn(52788)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790