is it -3sin^3(3x) or did i miss something?
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Originally Posted by daniels is it -3sin^3(3x) or did i miss something? Yes you need to use the chain rule. Twice. let and Then by the chain rule you get
so then im guessing for f(x) = 2sin(2x) + e^(3x^2) + cos^3(3x) f '(x) isn't= 4cos(2x) + 3e^(x^2) + -3sin^3(3x) ????
Originally Posted by daniels so then im guessing for f(x) = 2sin(2x) + e^(3x^2) + cos^3(3x) f '(x) isn't= 4cos(2x) + 3e^(x^2) + -3sin^3(3x) ???? The derivative of the first term is correct, you need to use the chain rule on the last two terms.
okay thnks
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