Question

The fifty term
of an AP is 1, whereas the
31st term is -77, which term of the Ap is - 17?
​

Answer 1

Answer:

10 th term

Step-by-step explanation:

a5=1

a1+4d=1 ----(1)

a31= - 77

a1+30d= -77 -----(2)

Solve (1) and (2) we get

a1= 13 and d= -3

a1+nd= - 17

Put the values of a1 and d, we get

n= 10

So -17 is the 10th term of AP