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Evaluate
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Differentiate w.r.t. h
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\frac{h^{9}}{h^{11}}
Use the rules of exponents to simplify the expression.
h^{9-11}
To divide powers of the same base, subtract the denominator's exponent from the numerator's exponent.
h^{-2}
Subtract 11 from 9.
\frac{\mathrm{d}}{\mathrm{d}h}(\frac{1}{1}h^{9-11})
To divide powers of the same base, subtract the denominator's exponent from the numerator's exponent.
\frac{\mathrm{d}}{\mathrm{d}h}(h^{-2})
Do the arithmetic.
-2h^{-2-1}
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}.
-2h^{-3}
Do the arithmetic.