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Evaluate
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Differentiate w.r.t. b
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\frac{\frac{a\times 2a^{2}}{b\times 3b^{2}}}{\frac{6a^{3}}{4b^{2}}}
Multiply \frac{a}{b} times \frac{2a^{2}}{3b^{2}} by multiplying numerator times numerator and denominator times denominator.
\frac{\frac{a\times 2a^{2}}{b\times 3b^{2}}}{\frac{3a^{3}}{2b^{2}}}
Cancel out 2 in both numerator and denominator.
\frac{a\times 2a^{2}\times 2b^{2}}{b\times 3b^{2}\times 3a^{3}}
Divide \frac{a\times 2a^{2}}{b\times 3b^{2}} by \frac{3a^{3}}{2b^{2}} by multiplying \frac{a\times 2a^{2}}{b\times 3b^{2}} by the reciprocal of \frac{3a^{3}}{2b^{2}}.
\frac{2\times 2}{3\times 3b}
Cancel out abba^{2} in both numerator and denominator.
\frac{4}{3\times 3b}
Multiply 2 and 2 to get 4.
\frac{4}{9b}
Multiply 3 and 3 to get 9.