Question

How do you find the term n=11, given the arithmetic sequence `a_1=5/2` and d=-3/2?

Answer 1

`T_11 =-12 1/2`

Explanation:

In an A.P., the general term is given by

`T_n = a_1 + (n-1)d" "larr` substitute for `a_1, d and n`

`T_11 = 5/2 + 10 xx (-3)/2`

`T_11 = 2 1/2 +(-15)`

`T_11 = -12 1/2`