Question

What is the 41st term of the arithmetic sequence where a1 = 17 and a15 = -39 ?

Answer 1

do you know the formula?

Answer 2

no..

Answer 3

well I think you know it !!!

Answer 4

is it the s=n-1

Answer 5

http://openstudy.com/users/crystal88#/updates/4f96eb5fe4b000ae9eccc16d

this Example is the same as the one I did there, just different numbers !

Answer 6

Try this:
\[\LARGE a_{15}=a_1+(15-1)d\]
and find "d"
once you've found it... substitute here..
\[\LARGE a_{41}=a_1+(41-1)d\]
Can you do it? :)

Answer 7

is it -143

Answer 8

I don't know (didn't calculate)... give me a second.

Answer 9

yes it is... well done :)

Answer 10

thanks

Answer 11

Glad to help xD