Let for . What is ? id the answer just 5/7?
Follow Math Help Forum on Facebook and Google+
Originally Posted by Tweety Let for . What is ? id the answer just 5/7? No. $\displaystyle y=\frac{5}{7x}=\frac{5}{7}x^{-1}$ Now you can just use the power rule $\displaystyle \frac{d}{dx}x^{\alpha} = \alpha x^{\alpha -1}$ In your case $\displaystyle \alpha =-1$
View Tag Cloud