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Evaluate
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Differentiate w.r.t. x
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2x^{-1}\times 2
To multiply powers of the same base, add their exponents. Add \frac{1}{6} and -\frac{7}{6} to get -1.
4x^{-1}
Multiply 2 and 2 to get 4.
\frac{\mathrm{d}}{\mathrm{d}x}(2x^{-1}\times 2)
To multiply powers of the same base, add their exponents. Add \frac{1}{6} and -\frac{7}{6} to get -1.
\frac{\mathrm{d}}{\mathrm{d}x}(4x^{-1})
Multiply 2 and 2 to get 4.
-4x^{-1-1}
The derivative of ax^{n} is nax^{n-1}.
-4x^{-2}
Subtract 1 from -1.