To simplify the expression \(\frac{75a^2b^{-2}}{5a^3b^{-3}}\), we can simplify the coefficients and the variables separately.
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Simplify the coefficients: \[ \frac{75}{5} = 15 \]
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Simplify the \(a\) terms: When dividing like bases, we subtract the exponents: \[ a^{2 - 3} = a^{-1} \]
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Simplify the \(b\) terms: Similarly, we subtract the exponents for \(b\): \[ b^{-2 - (-3)} = b^{-2 + 3} = b^{1} = b \]
Putting it all together: \[ \frac{75a^2b^{-2}}{5a^3b^{-3}} = 15a^{-1}b \]
To express \(a^{-1}\) in a more standard form: \[ = \frac{15b}{a} \]
So, the simplified expression is: \[ \frac{15b}{a} \]