Question

If f(x) =x³ - 5 xcosx + x²sinx show
that f(x) + f(-x) = 0​

Answer 1

case 1

put f(x)=x

then you get 1st eqñ

case 2

put f(x)= -x

then you get 2nd eqñ

put the value of eqñ (1) and eqñ (2)

get ans

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