The function ff is defined by f(x)=x^3+5\cos\left(2x^2-4\right).f(x)=x 3 +5cos(2x^2 ?4). Use a calculator to write the equation of the line tangent to the graph of ff when x=-0.5.x=?0.5. You should round all decimals to 3 places.
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Added: Wednesday 5th of January 2022