Differentiate w.r.t. c
13
Evaluate
13c
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\frac{\mathrm{d}}{\mathrm{d}c}(13c)
Combine 18c and -5c to get 13c.
13c^{1-1}
The derivative of ax^{n} is nax^{n-1}.
13c^{0}
Subtract 1 from 1.
13\times 1
For any term t except 0, t^{0}=1.
13
For any term t, t\times 1=t and 1t=t.
13c
Combine 18c and -5c to get 13c.
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