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The solution of inequality (x+1)(x2+1)1/2>x2-1 is(a) {-1} U [2,infinite)(b) [-1,infinite)(c){-4}u[2,3](d)(-5,infinite)

Vaibhav Mathur , 15 Years ago
Grade 12
anser 1 Answers
AskiitiansExpert Milanshu

Last Activity: 15 Years ago


(x+1)(x2+1)1/2>x2-1

(x+1)(x2+1)1/2>(x-1)(x+1)

either x=-1 or

case 1:x>-1

(x2+1)1/2>x-1

squaring both side,

 

(x2+1)>x2+1 +2x

therefore x>0

case 2: x<-1

(x2+1)1/2<x-1

therefore, x<0

therefore, answer is [-1,infinte)

 

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