Question

If(x+1),3xand(4x+2)areinAP,thenx=__________

Answer 1

Answer:

We know that if three numbers , say a , b , c are in A.P then b = ( a + c )/2

So x + 1 , 3x , 4x + 2 are in A.P

3x = (x +1 + 4x + 2)/2

6x = 5x + 3

x = 3

Hence the three numbers are 4, 9 , 14.

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