Question

lf a, a2 and 3a are in Ap , then the value of a is​

Answer 1

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Solution:-

Since a, a - 2 and 3a are in AP,

∴ a − 2 − a = 3a − ( a − 2 )

⇒ − 2 = 2a + 2

⇒ 2a = − 4

⇒ a = − 2 (Answer)

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Answer 2

Answer:

Given Information:

a, a-2, 3a are in AP.

we know that

d2-d1 = d3-d2

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

-2 = 2a+2

-2-2 = 2a

-4 = 2a

a= -2

The value of a is -2

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