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CBSE Class 10 Answered

PLS. prove
Asked by sonali221994 | 13 Feb, 2010, 08:37: PM
answered-by-expert Expert Answer

DEar Student

1/f=  1/u  +1/v
u=fv/(v-f)

m=-v/u
==>v=-mu=-mfv/(v-f)
==> 1=-m/(v/f    -1)
(v/f    -1) =-m
v/f=-m+1
v=f(1-m)

This is correct  

and (1-m)=1/((1-m)-1 1+m     for very smallervalues of m

Regards

Team

Topperlearning.com

 

Answered by | 15 Feb, 2010, 07:08: PM

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