Find the derivative of the function. 8x y = 1 + e 6x Step 1 Begin by writing the function as the sum of two natural exponential terms of the form e". 8x y = 1 + e 6x 1 6x = e-6x Differentiate. + + e8x 8x -6x e e 6x Step 2 The chain rule states if y=e", then dy dx 2x = eu. du dx In each term, the u is differentiable.