# Please look at the attachement and solve the 3 questions asked plaese

2
by rajusetu

2015-03-30T19:35:15+05:30
1)loga- log b= log(a-b)
log a/b=log (a-b)              WKT loga/b=loga-logb
a/b=a-b
a=-b²/1-b⇒b²/b-1
option a is correct

2)f(x)=log(1-x)/(1+x)
then f(1-x)/(1+x)
f(1-x)/(1+x)⇒log(1/1  -  1-x/1+x)
(1/1  +1-x/1+x)
log(1+x-1+x)/(1+x+1-x)
log(2x/2)⇒logx
option a is correct

aap galat keya
Maine solve kar ke answer diya hai
2015-04-01T04:41:42+05:30

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Log a / b = log (a - b)
a/b = a - b
a = ab - b²
a (b-1) = b²
a = b²/(b-1)
====================
f(x) = Log [ (1-x)/(1+x) ]
f( (1-x)/(1+x) ) = Log [  {1 - (1-x)/(1+x)} / { 1 + (1-x)/(1+x) } ]
= Log [ 2x / 2   ]
= Log x
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