Question

4. If a, (a-2), 3a are in A.P. then a=?

1:. -3
2: -2
3:. 2
4: 3 ​

Answer 1

Step-by-step explanation:

since these are in AP

there common difference must be equal.

(a-2)-a= 3a -(a-2)

a-2-a = 3a - a + 2

-2 = 2a+2

-2-2= 2a

a= -4/ 2

= -2