f(x) = 3x^2-5 and g(x) = 2/x. find the function of f(g(x)) and give the domain. Solve equation with exact answers: -x^2-3x+10 = 0 f(x) = ln(4-x) find the domain Help appreciated Thanks!
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Originally Posted by Murphie f(x) = 3x^2-5 and g(x) = 2/x. find the function of f(g(x)) and give the domain. Solve equation with exact answers: -x^2-3x+10 = 0 f(x) = ln(4-x) find the domain Help appreciated Thanks! 1) Substitute the x in f by the term of g: Since the division by zero is not allowed the domain is 2) Use the quadratic formula to solve this equation. I've got 3) You are supposed to know that the ln-function is defined for positive arguments only. Thus the domain is
Last edited by mr fantastic; Dec 14th 2008 at 01:01 AM. Reason: Removed reference to Jhevon's reply about not double posting
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