Find the derivative of the function.f(x) = (2x3 + 9)(5x7 - 7)
A. f'(x) = 8x9 + 315x6 - 42x
B. f'(x) = 100x9 + 315x6 - 42x
C. f'(x) = 100x9 + 315x6 - 42x2
D. f'(x) = 8x9 + 315x6 - 42x2
Answer: C
Mathematics
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A. 
ex
B. (x2 + 8) ex
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D. (2x - 2) ex
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A. True B. False
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Use a sum or difference identity to find the exact value.sin 
A. 
B. 
C. 
D. 
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Solve the problem.How many different 3-letter codes are there if only the letters A, B, C, D, E, F, G, H, and I can be used and no letter can be used more than once?
A. 3 B. 84 C. 504 D. 729
Mathematics