1 / a + 1 / b
2007-04-23 04:47:18 · 7 answers · asked by 19850421 1 in Science & Mathematics ➔ Mathematics
Same way you did in 5th grade; start by getting common denominators:
1/a + 1/b =
b/(ab) + a/(ab) =
(b+a)/(ab)
2007-04-23 04:52:47 · answer #1 · answered by Philo 7 · 1⤊ 1⤋
1/a + 1/b = (a+b)/a*b
2007-04-23 04:50:43 · answer #2 · answered by SuNiL 3 · 1⤊ 0⤋
Multiply each fraction by 1.
But dont write one, in the traditional way..
For 1/a..Multiply it by 1 written as b/b
For 1/b Multiply it by 1 written as a/a
1b/ab + 1a/ab
Eliminte the one coefficent in the numberator..they are unnecessary
b/ab + a/ab= b+a/ab
2007-04-23 04:53:22 · answer #3 · answered by RScott 3 · 0⤊ 0⤋
cross multiply the denominators to the numerators then add, then multiply the denominators
1/a + 1/b ; (b + a) / ab or (a+b) / ab
2007-04-23 04:53:39 · answer #4 · answered by hacker_lexy 3 · 0⤊ 0⤋
use the definition x/a+y/b =(bx+ay)/ab
b/b*x/a=1*x/a=x/a=bx/ab
2007-04-23 05:11:56 · answer #5 · answered by mathman241 6 · 0⤊ 0⤋
b / ab + a / ab = (b + a) / ab
2007-04-23 04:56:29 · answer #6 · answered by Como 7 · 0⤊ 0⤋
b/ab+a/ab= (b+a)/ab
2007-04-23 04:51:32 · answer #7 · answered by dwinbaycity 5 · 0⤊ 1⤋