Question

if 9,B&,7 are in ap then the value of B is

Answer 1

9 , B and 7 are in AP so the common difference is also same

B-9 = 7 -B
2B =7+9
2B =16
B=8

Value of B is 8

Answer 2

Hey mate !!

Here's the answer !!

Given: 9, B, 7 are in AP 

To Find: B

Proof:

In a AP, the difference of second term to the first term is equal to the difference of third term to that of second term.

That is,

a₂ - a₁ = a₃ - a₂

a₁ = 9

a₂ = B

a₃ = 7

= B - 9 = 7 - B

= B + B = 7 + 9

= 2B = 16

=> B = 16 / 2 = 8

Hence the value of B is 8

Hope my answer helped you !!

Cheers !!