The function is and the point is .

Apply derivative on each side with respect to .

Apply power rule of differentiation : .

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Find the slope at point .

Slope of the tangent at point is the derivative of the function at that point.

Substitute and in .

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Slope of the tangent at point is .

Point slope form of line equation is .

Substitute and in the point slope form.

The tangent line equation is  .