Step 3 Now write the derivative in terms of x by recalling that u = -3x + 7 and v = x + 7. du 1 += dx V [In(u)] + dx [In(v)] = dx 1 u 1 -3x + 7 d dx dv dx 1 d ] ) + ( x + 7) + (x + 7) X+7 dx

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