Differentiate w.r.t. x
28x^{3}
Evaluate
7x^{4}
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\frac{\mathrm{d}}{\mathrm{d}x}(7x^{4})
Combine 2x^{4} and 5x^{4} to get 7x^{4}.
4\times 7x^{4-1}
The derivative of ax^{n} is nax^{n-1}.
28x^{4-1}
Multiply 4 times 7.
28x^{3}
Subtract 1 from 4.
7x^{4}
Combine 2x^{4} and 5x^{4} to get 7x^{4}.
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