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Calculus1 15 Online
OpenStudy (anonymous):

Need help with this question, I'm not sure what to do, so the steps to solve the question would be appreciated.

OpenStudy (anonymous):

OpenStudy (anonymous):

@amistre64, @satellite73 or @freckles can one of you guys help?

OpenStudy (anonymous):

i closed the question :( ill open another one

OpenStudy (amistre64):

is f(x) got a hole at x=3? or a asymptote?

OpenStudy (amistre64):

by definition of a derivative, it is the left and right limits as x goes to 3

OpenStudy (anonymous):

It does not tell me if its a whole or asymptote

OpenStudy (amistre64):

oh it does ... you actually have to see it

OpenStudy (anonymous):

Is it a hole?

OpenStudy (anonymous):

since f(x) =6 when x=3?

OpenStudy (amistre64):

f(x) = (x^2-9)/(x-3) if the bottom is a factor of the top, then its removable when x=3 we get 0/0 thereofre x-3 is a factor of the top and the bottom f(x) can be considered equivalent to x+3

OpenStudy (amistre64):

the piecewise simply fills in the hole to make a complete line and the whole of it makes it equal to x+3

OpenStudy (anonymous):

ok, so what does F′(3) equal? do i plug 3 into x=3?

OpenStudy (amistre64):

no, lets say f(x) is your piecewise defined function, and say g(x) = x+3 f(x) = g(x) for all xs therefore the derivative of g(x) is the same as f(x)

OpenStudy (amistre64):

what is the derivative of x+3?

OpenStudy (anonymous):

that would be 1

OpenStudy (amistre64):

then at x=3, the derivative is 1

OpenStudy (anonymous):

oh ok, so 1 is my answer?

OpenStudy (amistre64):

id say so yes. even if we didnt have the equality ... the slope from the left and right as x approaches 3 is 1

OpenStudy (anonymous):

ok, thank you soo much! i now understand the question. thank you again!!

OpenStudy (amistre64):

youre welcome

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