Question

If x, 13, y, 3 are in A.P. then what is the value of x?​

Answer 1

Answer:

since they are in AP

a2-a1=a3-a2

13-x=y-13

x+y= 26----------------1

a3-a2=a4-a3

y-13=3-y

2y=16

y=8

substitute in -----------------1

x+8= 26

x=18

ANS : x=18

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