Differentiate w.r.t. n
35n^{4}
Evaluate
7n^{5}
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\frac{\mathrm{d}}{\mathrm{d}n}(7n^{5})
Combine 3n^{5} and 4n^{5} to get 7n^{5}.
5\times 7n^{5-1}
The derivative of ax^{n} is nax^{n-1}.
35n^{5-1}
Multiply 5 times 7.
35n^{4}
Subtract 1 from 5.
7n^{5}
Combine 3n^{5} and 4n^{5} to get 7n^{5}.
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Simultaneous equation
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