Tutors Answer Your Questions about Sequences-and-series (FREE)
Question 388210: I am supposed to add a sequence of numbers starting with one and going to number thirty. I have added them together and I got 465 as an answer. They want me to write a formula showing this. I don't know what to do next. I think it is something like 1+2+3...=30. but I am not sure.
Click here to see answer by robertb(4012)   |
Question 388365: a question on the homework i have says: Let the sum of an arithmetic sequence of eight terms be represented by the letter S. If the first term is "a" and the eighth term is "a/2" express "a" as a function of S.
Click here to see answer by stanbon(57308) |
Question 386839: Two cakes, A and B, weigh 15 kg altogether. If 1/3 of cake A and 1/4 of cake B are sold, the remaining part of cake A is 1/5 kg less than the remaining part of cake B. If cake A weighs x kg, form an equation in x and solve.
Click here to see answer by robertb(4012) |
Question 386742: you are training for a triathlon In your training routine each week you bike 5 times as far as and you run 4 times as far as you swim One week you trained a total of 200 miles how many miles did you swim that week?
Click here to see answer by robertb(4012) |
Question 389284: Let the function f be defined by y = f(x), where x and f(x) are real numbers.
f(x) = 4x + 10
Find the following. (Simplify your answers completely.)
f(2)= _____________
f(-3)= _____________
f(k)= _____________
f(k^2-1)= _______________
Click here to see answer by richard1234(5390)  |
Question 389284: Let the function f be defined by y = f(x), where x and f(x) are real numbers.
f(x) = 4x + 10
Find the following. (Simplify your answers completely.)
f(2)= _____________
f(-3)= _____________
f(k)= _____________
f(k^2-1)= _______________
Click here to see answer by ewatrrr(10682)  |
Question 389732: consider the function f(x) = (x - 3)^2 + 2. Evaluate a sum to approximate the area under the curve for the domain o < or equal x < or equal 2 using the type of rectangles in each part.
a.) use inscribed rectangles 0.5 units wide
b.) Use circumscribed rectangles 0.5 units wide
Click here to see answer by richard1234(5390) |
Question 390924: Domenik has a coin bank in which he saves only P1 coin and 5 coins. When the coin bank was full, he asked his father to open it for him and asked to count how much money was in it. His father told him that all in all Domenik was able to save p238 and there were 66 coins all in all. How many P1 and 5 coins where there in the coin bank?
Click here to see answer by mananth(12270)  |
Question 391704: The table shows the cost of buying mugs. Write an equation to model the data, Explain how you arrived at you equation.
Number of mugs 1, 2, 3, 4, 5
Total cost 11, 18, 25, 32, 39
you must include both the equation and explanation in your response.
Click here to see answer by Edwin McCravy(8908)  |
Question 391759: if the first term of a geometric sequence is 3/2 and the second and third terms are -3/4 and 3/8, respectively, which of the following represents the nth term of the sequence?
a) 3(-1)^n-1/2n
b) 3(-1)^n/2n
c) 3(-1)^n-1/2^n
d) 3(-1)^n/2^n
e) 3(-1)^n-1/2^n+1
please provide explanation!
Click here to see answer by stanbon(57308) |
Question 393978: I have to find the Recursive Definition for the sequence 0,3,7,12,18...
I have tried several different ways of writing the formula but none worked. The closest i got was 〖〖(A〗_(n-1))〗^2 +3.
when inputting this it worked for all A's except A_5 which gave me 19 instead of 18. :( somebody please help.
Please and thank you :)
Click here to see answer by richard1234(5390) |
|
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
|
