Question

For an A.P, If a25 – a20 = 4.5, then find the value of 'd'​

Answer 1

Answer:

an = a + (n - 1) × d

⇒ a25 = a + 24d

and a20 = a + 19d

a25 - a20 = 45

⇒ a + 24d - a - 19d = 45

⇒ 5d = 45

⇒ d = 9

Step-by-step explanation:

Answer 2

Step-by-step explanation:

a+24d-(a+19d)=45

a+24d-a-19d=45

5d=45

d=45/5

d=9

the question is hand small mistake there is no 4.5 there is 45 but there is 4.5 means the answer is 0.9