Re: DSE 2013 Paper Discussion

Posted by Arushi :)) on Feb 09, 2014; 2:33pm
URL: http://discussion-forum.276.s1.nabble.com/DSE-2013-Paper-Discussion-tp7584703p7584710.html

FOR QUESTION NO. 34
step1: find that value in f's domain where here the function attains value of 8
keeping f(x)=8
and solving for x we get x = 1.
step2: find the derivative of f at this point.. i.e 1
f'(1)=26
step3: the derivates of inverse functions are reciprocals of each other
so g'(8)= 1/f'(1)
hence the ans is 1/26