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Question

If (x+1),3x and (4x+2) are first three terms of an AP then its 5th term is -


A

14

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B

19

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C

24

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D

28

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Solution

The correct option is C

24


(x+1),3x,(4x+2) are in AP

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

x=3

The first three terms are 4, 9 and 14.

a=4,d=94=5

t5=a+4d=4+4(5)=24


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