If f(x) = x/(x-2) then value of f1(2)?
Solution
Correct Answer: Option C
দেওয়া আছে,
f(x)=x/(x-2)
ধরি ,y=f(x)
অতএব,y=x/(x-2)
বা,xy-2y=x
বা,xy-x=2y
বা,x(y-1)=2y
বা,x=2y/(y-1)
বা,f1(y)=2y/(y-1)
বা,f1(x)=2x/(x-1)
অতএব,f1(2)=2.2/2-1
=4/1
=4
f(x)=x/(x-2)
ধরি ,y=f(x)
অতএব,y=x/(x-2)
বা,xy-2y=x
বা,xy-x=2y
বা,x(y-1)=2y
বা,x=2y/(y-1)
বা,f1(y)=2y/(y-1)
বা,f1(x)=2x/(x-1)
অতএব,f1(2)=2.2/2-1
=4/1
=4
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