Differentiate w.r.t. c
-4.2
Evaluate
-\frac{21c}{5}-5.55
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\frac{\mathrm{d}}{\mathrm{d}c}(-5.55-4.2c)
Combine -8.55c and 4.35c to get -4.2c.
-4.2c^{1-1}
The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0. The derivative of ax^{n} is nax^{n-1}.
-4.2c^{0}
Subtract 1 from 1.
-4.2
For any term t except 0, t^{0}=1.
-5.55-4.2c
Combine -8.55c and 4.35c to get -4.2c.
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