Thursday, December 27, 2012

f(x) = 2x^3 and g(x) = x + logx. Find f(g(10).

 Given the function f(x) = 2x^3 and the function g(x) = x+log
x.   


 We need to find f(g(10)).


First
we will determine f(g(x)).


f(g(x) = f ( x+ log
x).


Substitute with x= ( x+ log x ) into
f(x).


          = 2(x+log x) ^3


Now to
find f(g(10)) we will substitute with x = 10


==> f(g(10)) = 2
( 10 + log10)^3


But we know that log 10 =
1


==> f(g(10)) = 2(10 +
1)^3


                    =
2(11)^3


                    =
2*1331


                     =
2662


==> f(g(10)) =
2662

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