Q.
A function F(x) satisfies the functional equation x2Fx+F1-x=2x-x4 for all real x. F(x) must be
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a
x2
b
1-x2
c
1+x2
d
x2+x+1
answer is B.
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Detailed Solution
x2Fx+F1-x=2x-x4 1Replacing x by 1-x, we get 1-x2F1-x+Fx=21-x-1-x4 2Eliminating Eliminating F(1 -x) from (1) and (2), we get Fx=1-x2
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