Solve the formula for the indicated letter
2007-02-08 13:52:00 · 4 answers · asked by Joe P 1 in Education & Reference ➔ Homework Help
ab/a+b
2007-02-08 13:56:16 · answer #1 · answered by redbull 1 · 1⤊ 0⤋
c = 1/(1/a + 1/b)
2007-02-08 13:58:26 · answer #2 · answered by Wocka wocka 6 · 0⤊ 0⤋
1/a+1/b=1/c for c
1. Multiply both sides by c
c(1/a+1/b)=1
which is c/a+c/b=1
2. Get the common denominator, which is ab
Multiply c/a by b/b (which equals 1 so it doesn't change the value) and multiply c/b by a/a
This gives you cb/ab+ca/ab=1
3. Add
(cb+ca)/ab=1
4. Multiply both sides by ab
cb+ca=ab
5. Factor out the c
c(b+a)=ab
6. Divide both sides by (b+a)
c=ab/(b+a)
...and you're done
Hope this helps
2007-02-08 14:15:06 · answer #3 · answered by pimemorizer 1 · 0⤊ 0⤋
c=1/1(a x b)?
that was just the wildest of guesses.
no paper or pencil involved.
2007-02-08 13:57:03 · answer #4 · answered by Anonymous · 0⤊ 0⤋