# Please help find composition of f and g means fog

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• April 14th 2009, 11:21 PM
tariq_ews
Please help find composition of f and g means fog
Hello Respected Sir,

i have a problem plz help.
$
For f(x)= 3x4-2x2
g(x) = 2/(x)1/2
$

find the composition of f and g.

i have just solve here

$
gof = ?
gof(x) = g(f(x))= 2/ (f(x))
gof(x)= 2/(3x4-2x2)1/2

$

but next
Plz help

the second question is that

find the 15th term of the following sequence

1/2,1/4,1/8,...
• April 15th 2009, 01:15 AM
mr fantastic
Quote:

Originally Posted by tariq_ews
[snip]
the second question is that

find the 15th term of the following sequence

1/2,1/4,1/8,...

Answered here: http://www.mathhelpforum.com/math-he...-question.html
• April 15th 2009, 03:29 AM
tariq_ews
Thanks
Respected Sir,

Thanks for giving me the procedure thanks again

Truly Regards,

Tariq
• April 15th 2009, 03:36 AM
tariq_ews
gof
Hello Respected Sir,

i have a problem plz help.
i have a question

http://www.mathhelpforum.com/math-he...d784c5b0-1.gif
[HTML]
g(x) = 2/sqrt(x)
[/HTML]
find the composition of f and g. i.e. gof?

i have just solve here

$
gof=?
Putting values of f(x)
gof(x) = g(f(x))
g(f(x)) = 2/sqrt (3x4-2x2)
$

but next i just confuse what can i do next

Plz help

Thanks in advance

Truly Regards,
Tariq