Question

For an A.P, if a25 - a20 = 45, then find the value of d.

Answer 1

heya!!

an = a + ( n - 1 )d


a25 = a + 24d

and

a20 = a + 19d


ACCORDING TO THE QUESTION

a + 24d - a - 19d = 45

5d = 45

d = 9


Therefore d = 9

Answer 2

Answer:

Step-by-step explanation:

Please see the attachment below.

Hope it helps.