Hey guys!

2f(x)-3f(1/x)=x^2, x not = 0, find f(2). options are

1. -7/4, 2.5/2, 3.-1, 4.none

Please solve it asap...i'm unable to solve it........thanks

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- Aug 13th 2008, 09:07 AMsapanjotSolve this function
Hey guys!

2f(x)-3f(1/x)=x^2, x not = 0, find f(2). options are

1. -7/4, 2.5/2, 3.-1, 4.none

Please solve it asap...i'm unable to solve it........thanks - Aug 13th 2008, 09:33 AMchoovuck
plug in x=2 and x=1/2, you obtain system of two equations, easy to solve. answer is f(2)=-7/4.

- Aug 13th 2008, 10:17 AMsapanjotthanks......n another prob...
thanks...tht helped a lot.......

there is another question:

f(x)=cos(log x) then find f(x)f(4)-1/2 ( f(x/4)+f(4x)). Options are:

1,-1,0,1 &-1 both - Aug 13th 2008, 03:43 PMPlato
To work this you will need to know these facts.

You can put all that together, after all it is your problem. - Aug 14th 2008, 07:11 AMsapanjotthanks...
Thanks mr.plato.....i knew it's my prob.....u didn't need to tell me tht...i was expecting only what u send-"a hint".......

nyways.....there is another question.....again i would appreciate a hint....

f is a real valued function given by , and a,b are roots of . Then

1. f(a) not equal to f(b), 2.f(a)=10, 3.f(b)=-10, 4. none of these. - Aug 14th 2008, 08:45 AMPlato
Well O.K., here is just a hint: