# What is natural logarithm of this expression? y = 4 &#x2217;<!-- ∗ --> [ x

What is natural logarithm of this expression?
$y=4\ast \left[{x}^{9}\ast {x}^{6}\right]$
Is it
$\mathrm{ln}\left(y\right)=4\ast \left[9\mathrm{ln}\left(x\right)+6\mathrm{ln}\left(x\right)\right]$
or
$\mathrm{ln}\left(y\right)=\mathrm{ln}\left(4\right)+9\mathrm{ln}\left(x\right)+6\mathrm{ln}\left(x\right)$
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Caiden Barrett
If $y=4\left[{x}^{9}\ast {x}^{6}\right]$ so you have
$y=4{x}^{9+6}=4{x}^{15}$
and so $\mathrm{ln}\left(y\right)=\mathrm{ln}\left(4{x}^{15}\right)$ and so