For the function shown below, find f(3):
http://i.imgur.com/HZQf5NY.png
f(3) = 98
f(3) = 242
f(3) = -7
f(3) = -16
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OpenStudy (anonymous):
f(3)=-62
OpenStudy (anonymous):
are you sure?
OpenStudy (anonymous):
it isn't even an option o.o
OpenStudy (anonymous):
yes i am sure...
OpenStudy (agent0smith):
f(3) means you need to plug in -3 in place of x in that equation. So do that.\[\Large y= -4x^2+56x-194\]plug in 3 for x\[\Large y= -4(3)^2+56(3)-194\]now do math or use a calculator.
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OpenStudy (agent0smith):
3, not -3.
OpenStudy (agent0smith):
The correct answer isn't an option, but you can still learn how to do it.
OpenStudy (anonymous):
So none of the options are right? I have to pick one :/
OpenStudy (agent0smith):
None are correct.
OpenStudy (anonymous):
which one should i pick? Are any of them close?
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OpenStudy (agent0smith):
It doesn't matter if any of them are close if they are all wrong.
Correct answer:
f(3)=-62
Choices:
f(3) = 98
f(3) = 242
f(3) = -7
f(3) = -16