woohoo
Given the parent functions f(x) = log10 x and g(x) = 5x − 2, what is f(x) • g(x)?
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myininaya
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That symbol between f and g means to multiply.
woohoo
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yes it does
myininaya
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Ok, do you need anymore help then?
woohoo
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lol yes I don't get the problem
woohoo
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How do I do it?
myininaya
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Take the expression that f is equal to and multiply it to the expression g is equal to.
anonymous
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i.e. stick a times sign between them, or just write them next to each other
woohoo
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How do I find out what each expression stands for?
myininaya
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It is given to you f(x)=log_10(x) and g(x)=5x-2
woohoo
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Yeah so how do I solve the expression?
myininaya
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There is really nothing to do here just replace f(x) with what it equals and replace g(x) with what it equals in the expression f(x)*g(x)
myininaya
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Like if I said f(x)=5x and g(x)=sin(x) then f(x)*g(x)=5x*sin(x)=5xsin(x)
woohoo
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you lost me
myininaya
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How about the example,
if f(x)=2x and g(x)=e^x then f(x)*g(x)=2x*e^x=2xe^x
woohoo
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Ok now I'm understanding you more, but i'm getting confused after the = sign.
myininaya
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Or here is another example
if f(x)=4x-2 and g(x)=9x then f(x)*g(x)=(4x-2)(9x)
And if you want you could distribute and say
f(x)*g(x)=(4x)(9x)-2(9x)=36x^2-18x
myininaya
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All I'm doing is saying what f(x)*g(x) is given what f(x) equals and g(x) equals
myininaya
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I'm just replacing f(x) with what it equals and replace g(x) with what it equals
woohoo
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see I donnt know how to get the equal part
myininaya
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You put an equal sign
myininaya
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Or do you mean the part that follows the equal sign
woohoo
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yes that
myininaya
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the part that follows the equal sign is f(x)*g(x)
woohoo
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after the equal part
myininaya
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just the expressions they are equal to instead of saying f(x)*g(x)
myininaya
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Like if I said f(x)=3 and g(x)=2
what is f(x)*g(x)?
woohoo
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6
myininaya
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yes or you could say 3*2 without simplifying right
myininaya
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so what is complicated about what your problem is asking then?
woohoo
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ok.. I'll be right back.
myininaya
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|dw:1387336186336:dw|
myininaya
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then you are done