calc question

Test Preparation
1

<p>what is:</p>

<p>d/dt (1/2xy)</p>

<p>is it:</p>

<p>1/2 dx/dt y + dy/dt x ?</p>

<p>or do you distribute the 1/2 all across the board? please let me know with parenthases and everything. thanks.</p>

2

<p>d/dt (1/2xy)
= (1/2) d/dt (xy)
= (1/2) (y<em>dx/dt+x</em>dy/dt)
= (1/2)y<em>dx/dt + (1/2)x</em>dy/dt</p>