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heckyeahrobin
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How do I find the difference quotient? I already have the function of x and the equation and the restriction. How do I start?
 2 years ago
 2 years ago
heckyeahrobin Group Title
How do I find the difference quotient? I already have the function of x and the equation and the restriction. How do I start?
 2 years ago
 2 years ago

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RadEn Group TitleBest ResponseYou've already chosen the best response.0
share ur question, please...
 2 years ago

heckyeahrobin Group TitleBest ResponseYou've already chosen the best response.0
i have already plugged in (3+h) for x. what do i do next? @RadEn
 2 years ago

RadEn Group TitleBest ResponseYou've already chosen the best response.0
about derivative by using limit methods, right ?
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.1
\(f(6)=5\) so we keep that number
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.1
then compute \[f(6+h)=5+6(6+h)(6+h)^2\] to get \[5+36+6h(36+12h+h^2)\] \[=56hh^2\] then subtract 5 so that \(f(6+h)f(6)=6hh^2\) divide by \(h\) and get \(6h\)
 2 years ago

heckyeahrobin Group TitleBest ResponseYou've already chosen the best response.0
so i don't divide by H until i have plugged in both 6+h and 6 and simplified both? @satellite73
 2 years ago

RadEn Group TitleBest ResponseYou've already chosen the best response.0
smart way : f(x) = 5+6xx^2 f'(x) = 62x if u want find value of f'(6), u just plug in x=6 into f'(x) so, f'(6)=62(6)=612= ????????? but if u want using limit's method, like @satellite73 said
 2 years ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.1
you do not divide by \(h\) until the end one reason is that you cannot divide by \(h\) until you have simplified the numerator so that everything without an \(h\) in it is gone
 2 years ago

heckyeahrobin Group TitleBest ResponseYou've already chosen the best response.0
Thank you!! both of your answers were very helpful!
 2 years ago
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