Question

2nd term and 8th terms of an AP are 5/8 and 17/8, find 20th term​

Answer 1

Actually you have given second term means....a+d and eight term means....a+ 7d

Now solve for a and d find their value

and substitute for 20th term mean a + 29d

you will get answer

I hope you understand!!!

Mark me brainliest.. and follow me

Answer 2

ANSWER : 20th term = 41/8

STEP BY STEP EXPLANATION :

a2 = a + d = 5/8

a8 = a + 7d = 17/8

By elimination method,

a + d = 5/8
-a+-7d = -17/8
-----------------------
-6d = -12/8

-d = -12/8 × 1/6

d = 3/2 × 1/6 = 1/4

Substituting in eq.1,

a + 1/4 = 5/8

a = 5/8 - 1/4 = 5/8 - 2/8

a = 3/8

a20 = a + 19d = 3/8 + 19(1/4)

=3/8 + 38/8 = 41/8

HOPE IT WOULD HELP U

PLS MARK IT AS BRAINLIEST