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Question

Solve and find the numbers of positive integral solutions of the following inequation.

2x3<x+23x+5, xϵR


A

2

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B

3

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C

4

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D

5

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Solution

The correct option is C

4


we have

2x3<x+23x+52x3<x+2 and x+23x+52xx<3+2 and 253xxx<5 and (3/2)x(3/2)xand x<5(3/2)x<5

But,xϵR,So, the solution set is{x:(3/2)x<5,xϵR}

So, positive integers which are belongs to the solution set are 1, 2 , 3, 4.

Hence, the total number of positive integers are 4.


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