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Mathematics 20 Online
OpenStudy (anonymous):

Solve this limit without L'Hopital \[\lim_{b \rightarrow 0}\frac{2x+b+b^2}{b}\] Answer: 1

hartnn (hartnn):

are you sure ? because its simply infinity, and not 1 and also L'Hopital's cannot be applied even if you wanted to. i would suggest to verify your Q, or answer.

hartnn (hartnn):

its infinity by directly plugging in b=0

OpenStudy (anonymous):

why i can't apply hopital?

OpenStudy (anonymous):

these are the alternatives: A)2 B)x C) d(x^2) D)(x^2)' E)1

hartnn (hartnn):

because to apply L'Hopitals rule, the form should be either 0/0 or infinity/infinity here its 2x/infinity, so you cannot.

OpenStudy (anonymous):

Maybe the alternatives on this problem are wrong

hartnn (hartnn):

*2x/0

OpenStudy (anonymous):

I see. I'm a little rusty with this topic.... Thank you

OpenStudy (eyust707):

for a second i thought i was loosing my mind

hartnn (hartnn):

if the question would have been \[\lim_{b \rightarrow 0}\frac{2xb+b^2}{b}\]then it woud be 2x

hartnn (hartnn):

which is option D) (x^2)'

OpenStudy (anonymous):

aaahhhhhhhhh

OpenStudy (anonymous):

that makes sense.........

OpenStudy (anonymous):

but the answer is (x^2)' or x^2??

hartnn (hartnn):

(x^2)' means derivative of x^2 w.r.t x ---->2x

hartnn (hartnn):

yes.

OpenStudy (anonymous):

hahhahahaa yessss I'm so sleepy Thank you GOKU. I'll see your movie next year :)

hartnn (hartnn):

me too :D :P

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