Constant Multiple and Power Rule
Let $$f$$ be the function defined by $$f(x) = 7x^3$$. What is $$f'(x)$$?
A
The derivative is $$21*x^3$$.
B
The derivative is $$21*x^2$$.
C
The derivative is $$7*x^2$$.
D
The derivative is $$3*x^2$$, with the constant ignored.
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