Question

Find the value of x if 21, x, 11 are in AP.​

Answer 1

Answer:

x=16

formula used:

a1 - a2 = d

Answer 2

Answer:

x= 16

Step-by-step explanation:

21, x, 11 are in A.P

a = 21

d1 = x-21

d2 = 11-x

Since, they are in A.P,

Therefore,

d1 = d2

x-21 = 11-x

x+x = 11+21

2x = 32

x = 32/2

x = 16 ans