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P1 maths question

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ifraha18:
the function f is such that f(x) = (3x + 2)3 ? 5 for x ? 0.
ii) Obtain an expression for f?1(x) and state the domain of f?1.
..????

nid404:
what is the ? in ur question

ifraha18:
The function f is such that f(x) = (3x + 2)3 ? 5 for x ? 0.

wht is finverse of x.?n its rannge..june 2008 ppr 1 q6.

ifraha18:
(3x+2)^3_5  for X>0

wht is finverse.?n its range.?

nid404:
ohk..

here

y=
to get inverse you make x the subject



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now range of f(x)= domain of f-1(x)
range of f(x) can be as the domain for it is given as x>=0
sub 0 in f(x) y>=3

this is the domain of the  inverse function
D of f-1(x) x>=3

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