Qualification > Math

Maths help!

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astarmathsandphysics:
L'hopitals rule. When i get home.

SGVaibhav:
i dont know that rule.
anyone knowing that over here.

astarmathsandphysics:
L'Hopitals rule: If f=g=0 at x=a them lim x-->a f/g=f'/g'
 t^3 + 3t^2 - 12t + 4 =f so f'=3t^2+6t-12 and when t=2, f'=12
g=t^3-4t so g'=3t^2-4 and when t=2 g'=8
then lim t-->2 f/g=12/8=1.5

SGVaibhav:
but then where is it mentioned that f=g=0   ???

and can we use the derivative anytime we want to? (because its so easy :D)

astarmathsandphysics:
f=g has to be 0 else you cannot use the rule.

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