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Question

Write the number of integral solutions of x+2x2+1>12

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Solution

x+2x2+1>122x+4>x2+14>x22x+14>(x1)22>|x1|12<x<1+21<x<3x ϵ (1,3)x can take values 0,1,2 as the integral solutions for x+2x2+1>12Hence,the number of integral solutions of x+2x2+1>12 is 3


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