Solve..!!

Solve this:
Consider the following-
f(x)= x2+3x
g(x)=3x+4

For what value of f[g(x)] has its minimum value ,
a) 0  b)  -11/2   c) -11/6    d) None of these

Ans: a) 0

__________________

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Solve this:Consider the

Solve this:
Consider the following-
f(x)= x2+3x
g(x)=3x+4

For what value of f[g(x)] has its minimum value ,
a) 0  b)  -11/2   c) -11/6    d) None of these

Ans: a) 0

 

here f(g(x))=9x^2+33x+28

d f(g(x))/dx so x=-11/6 so equation minimum at -11/6

Little Star

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Thats the problem even I am

Thats the problem even I am getting -11/6, but the answer given is 0 thats  why I got confused ... I am not in touch with maxima minima for long...so I thought that it seems I have even forgotten the basics of this topic..

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