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anonymous
 5 years ago
a function "f" is defined as follows: f:[2,a] > R, where f(x) = (x1)squared  4. if f(a) = 12, find the value of a??
anonymous
 5 years ago
a function "f" is defined as follows: f:[2,a] > R, where f(x) = (x1)squared  4. if f(a) = 12, find the value of a??

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sorryi meant if f(x) = 12, what is x.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no wait the first one was right. i got things mixed up ><

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0This looks worse than it is. You're given the function f(x) and you know that when x=a, the function equals 12; that is, for x=a, f(a)=12. So,\[f(a)=(a1)^24=12\]Solving for a:\[(a1)^2=16\rightarrow a1=\pm4 \rightarrow a=3, 5\]So a can be either 3 or 5.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ur welcome. feel free to 'fan' me.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh okay. i just did. im new to this hahaha,
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