Differentiate w.r.t. u
28
Evaluate
28u
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\frac{\mathrm{d}}{\mathrm{d}u}(28u)
Combine 55u and -27u to get 28u.
28u^{1-1}
The derivative of ax^{n} is nax^{n-1}.
28u^{0}
Subtract 1 from 1.
28\times 1
For any term t except 0, t^{0}=1.
28
For any term t, t\times 1=t and 1t=t.
28u
Combine 55u and -27u to get 28u.
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