Differentiate w.r.t. a
480a
Evaluate
240a^{2}
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2\times 240a^{2-1}
The derivative of ax^{n} is nax^{n-1}.
480a^{2-1}
Multiply 2 times 240.
480a^{1}
Subtract 1 from 2.
480a
For any term t, t^{1}=t.
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