Precalc Math Help: Find (g o f)(-2)

carebear184 · 2007-05-07T23:06:43+00:00

Hi, I need help with the following problem: If f(x)=4-x and the g(x)=1+x^2 find the (g(small circle)f)(-2). Thanks

Thread 'How does time derivative commute from one variable to another?'

I'm reviewing Meirovitch's "Methods of Analytical Dynamics," and I don't understand the commutation of the derivative from r to dr: $$ \mathbf{F} \cdot d\mathbf{r} = m \ddot{\mathbf{r}} \cdot d\mathbf{r} = m\mathbf{\dot{r}} \cdot d\mathbf{\dot{r}} $$

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Thread 'How does time derivative commute from one variable to another?'

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