Question

If a+b=3 and ab=4, 1/a + 1/b = ?

An explanation would also be helpful. Thanks!

Answer 1

a+b/ab =3/4

Answer 2

\[\frac{1}{a}+\frac{1}{b}\]



\[\frac{b}{ab}+\frac{a}{ab}\]



\[\frac{b+a}{ab}\]



\[\frac{a+b}{ab}\]



\[\frac{3}{4}\]



So \[\frac{1}{a}+\frac{1}{b}=\frac{3}{4}\]

Answer 3

Thank you! :D