Question

makr R the subject of the formula:

1/r = 1/r1 + 1/r2

Answer 1

please help

Answer 2

R=(R1R2)/(R1+R2)

Answer 3

\[\frac{1}{R_1}+\frac{1}{R_2}=\frac{R_1+R_2}{R_1\times R_2}\]

Answer 4

so if
\[\frac{1}{R}=\frac{R_1+R_2}{R_1\times R_2}\] then
\[R=\frac{R_1R_2}{R_1+R_2}\]

Answer 5

Now make R1 the subject of the formula

Answer 6

pls help

Answer 7

sarah . L can you give me the full working pls

Answer 8

thx for all sarah.l

Answer 9

\[\frac{1}{R}=\frac{1}{R1}+\frac{1}{R2}\]\[\frac{1}{R1}=\frac{1}{R2}-\frac{1}{R}\]\[\frac{1}{R1}= (\frac{1}{R2} \times \frac{R}{R}) - (\frac{1}{R} \times \frac{R2}{R2})\]\[\frac{1}{R1}= \frac{R}{R2 \times R} - \frac{R2}{R \times R2}\]\[\frac{1}{R1}= \frac{R-R2}{R2 \times R1}\]\[\underline{so} R1=\frac{R2 \times R}{ R-R2}\]

Answer 10

thx life

Answer 11

i should by you a drees

Answer 12

lol your welcome

Answer 13

sarah ill need the working for R as subject of the formula

Answer 14

could you help

Answer 15

Same steps.. and satelite already did it

Answer 16

she is a lot better looking than i am for sure but i wrote out all the steps above

Answer 17

lol how sweet

Answer 18

how the 1/r became r?

Answer 19

help

Answer 20

of course as far as i know sarah.l is a 64 year old pot bellied bald man with a cigar and a 5 o'clock shadow.