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If `f(x) = cos(logx),` then `f(x^2)f(y^2) - 1/2 [f(x^2/y^2)+f(x^2y^2)]` has the value

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If `f(x) = cos(logx),` then `f(x^2)f(y^2) - 1/2 [f(x^2/y^2)+f(x^2y^2)]` has the value
A. `(1)/(2)`
B. `-1`
C. `-2`
D. None of these
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1 Answer

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Correct Answer - d
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