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anonymous
 one year ago
please help!!!!!!!!
f(x)=3x6
g(x)=x2
find f(g) and domain
anonymous
 one year ago
please help!!!!!!!! f(x)=3x6 g(x)=x2 find f(g) and domain

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Basically you need to put in G(x) into all the x values of the F(x) function. f(g) = 3(x2)  6 f(g) = 3x66 f(g) = 3x12 > final answer.

marigirl
 one year ago
Best ResponseYou've already chosen the best response.0You can think of it like this: f(x)=3x6 and rewrite it to f(x)= 3*unit 6 g(x)=x2 and rewrite it to g(x)= unit2 find f(g) and domain f(g)= f(x2) now we know f(x) is 3*unit 6 and our unit now is (x2) f(g)= 3(x2)  6 f(g)= 3x66 Expand brackets f(g)= 3x12 Domain can be real numbers since both f(g) and g(x) are functions with real values

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@marigirl @kieran01pd2016 i know it equals 3x12 but the answers only supplies me with a)3 b)3 c)1

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0fg has to be a single number for the answer i just dont know what

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2`f(g)` makes no sense to be honest it should be `f(g(x))` or something like `f(g(23))`

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2I guess if you did say `f(g)`, it would mean you replace every x in f(x) with g f(x)=3x6 f(g)=3g6 but that's not what they want

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.0scan or link the question, pls :p

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@irishboy123 sadly my class supplied this exact question only with nothing else

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It's 3 guys thanks .

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I think idk just gonna guess thanks

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Let f(x) = 3x  6 and g(x) = x  2. Find (f*g) and states its domain? A. 3; all real numbers except x = 2 B. –3; all real numbers except x = 3 C. 1; all real numbers D. 3; all real numbers

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2did you mean (f/g)(x) ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2or f(x)/g(x) ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It's f times g , it makes no sense to me but it's the question

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2This is a very awful question. I think they meant to ask f/g because none of the answer choices make sense if it was f*g

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2\[\Large (f/g)(x) = \frac{f(x)}{g(x)}\] \[\Large (f/g)(x) = \frac{3x6}{x2}\] \[\Large (f/g)(x) = \frac{3(x2)}{x2}\] \[\Large (f/g)(x) = \frac{3\cancel{(x2)}}{\cancel{x2}}\] \[\Large (f/g)(x) = 3\] where x cannot equal 2 (to avoid division by zero errors)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah ill ask about if it was f/g would the answer be a

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2IF it was f*g, then you'd have \[\Large (f*g)(x) = f(x)*g(x)\] \[\Large (f*g)(x) = (3x6)*(x2)\] \[\Large (f*g)(x) = 3x^26x6x+12\] \[\Large (f*g)(x) = 3x^212x+12\]
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