# But What Is \(b\)?

**Calculus**Level 2

\[\large \displaystyle\lim_{a\to b}\frac{a\sqrt{a}-b\sqrt{b}}{\sqrt{a}-\sqrt{b}} = \, ? \]

Take \(b> 0 \).

\[\large \displaystyle\lim_{a\to b}\frac{a\sqrt{a}-b\sqrt{b}}{\sqrt{a}-\sqrt{b}} = \, ? \]

Take \(b> 0 \).

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