Use Negative Power Rule: \({x}^{-a}=\frac{1}{{x}^{a}}\).
\[b\times 1\times \frac{1}{{y}^{5}},yne\times 0\]
Simplify \(b\times 1\times \frac{1}{{y}^{5}}\) to \(\frac{b}{{y}^{5}}\).
\[\frac{b}{{y}^{5}},yne\times 0\]
Simplify \(yne\times 0\) to \(0\).
\[\frac{b}{{y}^{5}},0\]
b/y^5,0
