Try another version of this question Find the derivative of `f(x)=``-7x^5+9x^9` . `f'(x)=` Get help: VideoBox 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c Be sure your variables match those in the question `-35 x^(4) + 81 x^(8)`
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Get help: Video
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c Be sure your variables match those in the question