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Mathematics 11 Online
OpenStudy (lovelyharmonics):

derivatives

OpenStudy (lovelyharmonics):

find the derivative for 4/x at x=2

OpenStudy (lovelyharmonics):

@aajugdar since x^1-1=0 wouldn't x=1?

OpenStudy (lovelyharmonics):

hi ganeshie!

ganeshie8 (ganeshie8):

hey are you using limit definition of derivative ?

OpenStudy (lovelyharmonics):

derivative

OpenStudy (anonymous):

no x is in denominator it becomes x^-1 when coming to numerator

OpenStudy (lovelyharmonics):

:c but.... i was so close to understanding it...

OpenStudy (anonymous):

yes so x^-1-1 becomes x^-2

OpenStudy (anonymous):

yeah you are close to understanding it ^^

OpenStudy (anonymous):

but

OpenStudy (anonymous):

remember the formula hartnn gave you?

OpenStudy (lovelyharmonics):

yusssss d/dx x^n

OpenStudy (anonymous):

you will also multiply x by -1

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

so its -x^-2

OpenStudy (lovelyharmonics):

so 4/4(-1)x

OpenStudy (lovelyharmonics):

okay just kidding .-.

OpenStudy (anonymous):

lol no x :P so its -4x^-2 which becomes -4/x^2 so put x=2 you will get ur answer

OpenStudy (lovelyharmonics):

so its -1?

OpenStudy (anonymous):

yep

OpenStudy (lovelyharmonics):

yay c: do you want to help me with limits now? ^.^

OpenStudy (anonymous):

well am here for another 10 mins so lets see

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