Differentiate w.r.t. t
28t
Evaluate
14t^{2}
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2\times 14t^{2-1}
The derivative of ax^{n} is nax^{n-1}.
28t^{2-1}
Multiply 2 times 14.
28t^{1}
Subtract 1 from 2.
28t
For any term t, t^{1}=t.
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