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Mathematics 7 Online
OpenStudy (anonymous):

thanks

OpenStudy (anonymous):

@ganeshie8

ganeshie8 (ganeshie8):

\[(f\circ g)(4)\] like this ?

OpenStudy (anonymous):

yep

ganeshie8 (ganeshie8):

\[(f\circ g)(4) = f(g(4))\]

ganeshie8 (ganeshie8):

start by evaluating \(g(4)\)

ganeshie8 (ganeshie8):

\(g(x) = x^2+1\) \(g(4) = ?\)

OpenStudy (anonymous):

g(4)=x^2+1?

ganeshie8 (ganeshie8):

replace x by 4

ganeshie8 (ganeshie8):

\(g(4) = 4^2 + 1 = ?\)

OpenStudy (anonymous):

17

ganeshie8 (ganeshie8):

Yes

ganeshie8 (ganeshie8):

\[(f\circ g)(4) = f(g(4)) = f(17) = ?\]

ganeshie8 (ganeshie8):

evaluate f(17) and you're done!

ganeshie8 (ganeshie8):

\(f(x) = x-8\) \(f(17) = ?\)

OpenStudy (anonymous):

so its just 17

ganeshie8 (ganeshie8):

nope you need to evaluate f(17) still

OpenStudy (anonymous):

im lose and its even

ganeshie8 (ganeshie8):

you have \(f(x) = x-8\) simply replace \(x\) by \(17\) for \(f(17)\) : \(f(17) = 17-8 = ?\)

OpenStudy (anonymous):

9

OpenStudy (anonymous):

thanks so much!!!!

ganeshie8 (ganeshie8):

thats right! please go through all the steps again

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