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OpenStudy (anonymous):
let f(x)=x^2-6,g(x)=x-2. find (fg)(-1)
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OpenStudy (anonymous):
what is \(f(1)\) ?
OpenStudy (anonymous):
it is -1 not one
OpenStudy (anonymous):
ok fine what is \(f(-1)\) ?
OpenStudy (anonymous):
-5
OpenStudy (anonymous):
good and \(g(-1)\) ?
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OpenStudy (anonymous):
-3
OpenStudy (anonymous):
yes, and so \[fg(-1)=f(-1)g(-1)=(-5)\times (-3)\]
OpenStudy (anonymous):
15
OpenStudy (anonymous):
yes
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