Question

The 5th term of an ap is 34 and 15th term is 9. Find the common difference r th term

Answer 1

Hey mate your answer is in the attachment

Answer 2

Answer:

d = -2.5

Step-by-step explanation:

Given,

a5 = 34

a15 = 9

d = ?

We know,

an = a +(n-1)d

a5 = a +(5-1)d

34 = a + 4d....................(1)

similarly,

9 = a + 14d........................(2)

By Substitute eq(1) and eq(2) we get,

-10d = 25

d = -2.5 (Answer)