Differentiate w.r.t. a
8
Evaluate
8a
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\frac{\mathrm{d}}{\mathrm{d}a}(8a)
Combine 5a and 3a to get 8a.
8a^{1-1}
The derivative of ax^{n} is nax^{n-1}.
8a^{0}
Subtract 1 from 1.
8\times 1
For any term t except 0, t^{0}=1.
8
For any term t, t\times 1=t and 1t=t.
8a
Combine 5a and 3a to get 8a.
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