f(x)=(-2x^8)cos(x)

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Solution for f(x)=(-2x^8)cos(x) equation: 


Simplifying
f(x) = (-2x8) * cos(x)

Multiply f * x
fx = (-2x8) * cos(x)

Remove parenthesis around (-2x8)
fx = -2x8 * cos(x)

Multiply x8 * cos
fx = -2cosx8 * x

Multiply cosx8 * x
fx = -2cosx9

Solving
fx = -2cosx9

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.
f = -2cosx8

Simplifying
f = -2cosx8

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