How to shorten this fraction?
$R_1+R_2$ divided by $\frac1{R_1} + \frac1{R_2}$
The answer is $R_1R_2$. I just don't know how to get there.
I have injection $f \colon A \rightarrow B$ and I want to get bijection. Can I just resting codomain to $f(A)$? I know that every function i...
No comments:
Post a Comment