Question

In an A.P. first two terms are 5, 10 then 87th term is ......​

Answer 1

Answer:

87th term is 435

Explanation:

a=5

d=10-5=5

n=87

Tn=a+(n-1)d

T87=5+(87-1)5

T87=5+(86)5

T87=5+430

T87=435

Answer 2

Answer:

In an A.p. first two terms are 5 , 10 then 87 th term is :-

so we'll find T87 first through AP . Tn = 1 ( 87 - 1 ) × 2 = 173 . Now, 87 th term = 173² + 1 = 29929 + 1 = 29930

Explanation:

hope its help you