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Q. The number of solution of the equation [x]+[-x]+x2=1, where [.] denotes the greatest integer function is.
(A) Infinitely many
(B) 4
(C) 2
(D) 0

x+-x+x2=1Note:-x=-x=-x , if x is an integer-x=-x-1 , if x is not an integerCase 1: x is an integerx-x+x2=1x2=1x=±1Case 2: x is not an integerx-x-1+x2=1-1+x2=1x2=2x=±2Hence there are 4 solutions

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