Question

Help please? find the sum of the first 17 terms.....?

Answer 1

is the sequence arithmetic or geometric...?

Answer 2

arithmetric. it says it in the image. @campbell_st

Answer 3

ok... so what is the common difference ?

then use the formula

\[S_{n} = \frac{n}{2}[2a+ (n - 1) \times d)]\]

n = the number of terms, a = 1st term, d = common difference...

substitute the values and calculate the answer

Answer 4

@campbell_st i got 708 is that right? sorry for the late reply btw, i had to get off yesterday