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

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 Algebra: Sequences of numbers, series and how to sum them Solvers Lessons Answers archive Quiz In Depth

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

 Question 634458: Write a recursive formula for the sequence 8, 10, 12, 14, 16... Then find the next term. Click here to see answer by jim_thompson5910(28536)

 Question 634654: In the arithmetic sequence: a(sub 5) =0, and a(sub 25) =8. What is a(sub 2)? Thank you very much for helping me out! For you time and everything! Thank you very much! Click here to see answer by ewatrrr(10682)

 Question 634655: In sequence 3, 7, 11, 15, 19..., find S(sub 50). If S(sub 0)= 3 Thank you so much in helping me! Click here to see answer by ewatrrr(10682)

 Question 634659: Use the remainder theorem to find f(c). f(x)=2x^3-x^2+8x-4; c=2 Click here to see answer by nerdybill(6957)

 Question 634665: Find the nth term, the fifth term, and the eighth term of the geometric sequence.. 64, 16, 4, 1 ...... an= a8= Click here to see answer by nerdybill(6957)

 Question 634668: Sequence: 3, -6, 12, -24, 48,..., find S(sub 20). If S(sub 0)= 3. Then find the sum through S(sub 20). Thank you so much for your time, and everything in helping me understand this problem! Thank you! Click here to see answer by ewatrrr(10682)

 Question 634686: Hi could you please guide me through this? Thank you so much, and for your time! Given a sequence is arithmetic find the 4 terms between 6 and 121. Also: Given the sequence is geometric find the 3 terms between 6 and 3.9366. Thank you so much with these problems! Thank you a lot! Click here to see answer by jim_thompson5910(28536)

 Question 634715: Hi! Could you please help me out in this problem! Thank you so much, and for your generous time! Find d (common diffrence) when a(sub 0) is 3/20. And a(sub 4) is 6/5. Thank you once again! Click here to see answer by stanbon(57290)

 Question 634716: Please help me out in this sequence of finding r! Thank you so much! Find r given a(sub 0) is -20. and a(sub 4) = -2500 Thank you for your time in helping me! Click here to see answer by stanbon(57290)

 Question 634886: Write an explicit rule for t(n) for the arithmetic sequence: 2, 5/3, 4/3, 1, 2/3, .. Click here to see answer by ewatrrr(10682)

 Question 634888: Write an explicit rule for t(n) of the geometric sequence below: 2, 3/2, 9/8, 27/32 ..... Click here to see answer by ewatrrr(10682)

 Question 634956: Brett started a race at 6:30 a.m. and he did not cross the finish line until 1:05 p.m.. How long did it take for brett to finish the race? Click here to see answer by Alan3354(30993)

 Question 634979: State whether the following sequence is arithmetic, geometric, or neither. 4, 15, 26, 37, 48, 59, . Click here to see answer by Alan3354(30993)

 Question 634988: Use inductive reasoning to find a pattern, and then make a reasonable conjecture for the next number in the sequence.11 12 9 10 7 8 5 6 Click here to see answer by stanbon(57290)

 Question 635192: find a[20] when a[1]=9 and d=2 Click here to see answer by ewatrrr(10682)

 Question 635385: You invest \$2,500 at an interest rate that is compounded annually. After 8 years, your principal has increased to \$3,046.01. What percent is the interest rate? Click here to see answer by reviewermath(507)

 Question 635863: a3=5, a8=1/625. How do I find A5 and An? Ans: a5=5/8 and an=10(-1/20)^n-1 Click here to see answer by Alan3354(30993)
 Question 635863: a3=5, a8=1/625. How do I find A5 and An? Ans: a5=5/8 and an=10(-1/20)^n-1 Click here to see answer by MathTherapy(1422)

 Question 636167: The product of a number and 19 decreased by 27 is 24 Click here to see answer by jim_thompson5910(28536)

 Question 636277: Which of the following are the terms of sequence  33, 26, 19,  12.............? Indicate all such terms Click here to see answer by ewatrrr(10682)

 Question 636692: How do i find the 15th term of the series 3,7,11,15... Click here to see answer by jim_thompson5910(28536)

 Question 637072: What are the next three numbers in this series of numbers? 1,3,9,19,33,51,73 Click here to see answer by checkley79(3050)

 Question 637274: Find the sum of the first ten terms of the the series 1+4+16+64+256 Click here to see answer by KMST(1868)

 Question 637625: find the next number in the sequence 1 7 33 159 785.......... Click here to see answer by MathLover1(6625)

 Question 637907: three consecutive terms if an AP have sum 21 and product 315.find the three numbers of the arithmetic progression. Click here to see answer by reviewermath(507)

 Question 637911: (a)if log x , log(x+2) , log(x+16) are three consecutive terms of an AP, find the value of x. (B)the sixth terms of an AP is Twice the Second term and the fifth term exceeds the first term by 10.find first term and the common difference. Click here to see answer by reviewermath(507)

 Question 638906: Determine whether or not the relation is a function. {(-3, 6), (-2, 7), (-1, 8), (0, 9)} Click here to see answer by KMST(1868)

 Question 639064: What comes next in the sequence: 1, 3, 4, 7, 11 ...... Click here to see answer by MathLover1(6625)

 Question 639074: 26. The first five terms of a linear sequence are given below. What is the next term of the sequence? 13, 18, 23, 28, 38, ____ There is a difference of 5 between every number, I got 38, but answers are : A. 28 B. 10 C. 6 D. 32 Click here to see answer by solver91311(16872)
 Question 639074: 26. The first five terms of a linear sequence are given below. What is the next term of the sequence? 13, 18, 23, 28, 38, ____ There is a difference of 5 between every number, I got 38, but answers are : A. 28 B. 10 C. 6 D. 32 Click here to see answer by Edwin McCravy(8893)

 Question 639176: What is the sum of a 30term arithmetic sequence where the first term is 73 and the last term is 101? Click here to see answer by jim_thompson5910(28536)

 Question 639183: Find a set of at least 5 data values that has a mean of 20 and a standard deviation of 6. Click here to see answer by jim_thompson5910(28536)

 Question 639198: I'm working on summation notation. there's an infinity on the top, n=0 on bottom, and 8(1/2)^n on the right. Where do I begin and how do I do it? Click here to see answer by solver91311(16872)

 Question 639190: If 2 cars leave a location at the same time headed in the same direction and one is traveling 65 mph and the ther car is traveling 45 mph, how long will it take the two cars to be 90 miles apart? Click here to see answer by solver91311(16872)

 Question 639363: Solve for the next two numbers in the following number sequence: 1728, 1000, 512, 216, _, _. Click here to see answer by jim_thompson5910(28536)

 Question 639512: How would I write this series in summation notation? 1 + 1/2 + 1/3 + . . . + 1/20 Click here to see answer by Tatiana_Stebko(1326)

 Question 639731: Write the nth term of the following sequence in terms of the first term of the sequence. Please explain this in addition to offering the general term of the sequence. Thank you! 10, 20, 40, . . . Click here to see answer by reviewermath(507)

 Question 639924: 1,4,27,4,25,216,7... Click here to see answer by Edwin McCravy(8893)

 Question 640266: describe a pattern in the sequence of numbers. predict the next number. 1, -4, 9, -16,.... Click here to see answer by reviewermath(507)

 Question 640296: 2.0,3.1,4.2,5.3 is this geometric arithmetic or neither? Click here to see answer by reviewermath(507)

 Question 640549: 4x-3=7+9x Click here to see answer by jim_thompson5910(28536)

 Question 640976: what is the cos y if a=8, b=7, c=15 Click here to see answer by Alan3354(30993)

 Question 641799: explain why 400% od 5 and 4% of 599 are the same amount Click here to see answer by MathLover1(6625)

 Question 641912: 8/9=x+1/3(7) So far I did the recepricoal 3/1 multiplied that by 7 and got 21 after that im stuck /: Thank you in advance Click here to see answer by solver91311(16872)

 Question 642225: The formula for the general term of the infinite sequence 12,17,22,27,32....is 5n-7 5n 5n+2 5n+7 ?? Thank you for the help Click here to see answer by stanbon(57290)

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