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Mathematics 28 Online
OpenStudy (anonymous):

Ughhh another limit question...

OpenStudy (anonymous):

???

OpenStudy (anonymous):

\[\frac{ x-2 }{ \sqrt[3]{x}-\sqrt[3]{2} }\]

OpenStudy (anonymous):

lim x->2

hartnn (hartnn):

can u use L'Hopital's rule?

OpenStudy (anonymous):

so I know i need to rationalize

OpenStudy (anonymous):

no we have not learned that yet

OpenStudy (anonymous):

Yes u can do that @Calle87

hartnn (hartnn):

ok, so rationalize it is...

OpenStudy (anonymous):

Rationalize the denominator

OpenStudy (anonymous):

thats where im rusty, that 3rd root is killin me

OpenStudy (anonymous):

shoul i write them as fractions?

OpenStudy (anonymous):

i think there's a formula for this question... a3 - b3 = (a-b)(a2+ab+b2) so put cube root x as a and cube root 2 as b and substitute... you get numerator and a part of denominator cancelled... then apply the limit!!!!!1 hope u understood

OpenStudy (anonymous):

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