Monday, November 11, 2019

lim_(x->oo)(x^2+4x+7)/(x-6) Evaluate the limit, using L’Hôpital’s Rule if necessary.

Given to solve,
lim_(x->oo) (x^2 +4x+7)/(x-6)
as x->oo then the (x^2 +4x+7)/(x-6) =oo/oo is of indeterminate form
so upon applying the L 'Hopital rule we get the solution as follows,
If lim_(x->a) f(x)/g(x) is = 0/0 or (+-oo)/(+-oo) then by using the L'Hopital Rule we get  the solution with the  below form.
lim_(x->a) (f'(x))/(g'(x))
 
so , now evaluating
lim_(x->oo) (x^2 +4x+7)/(x-6)
= lim_(x->oo) ((x^2 +4x+7)')/((x-6)')
= lim_(x->oo) (2x+4)/(1)
by plugging the value x=oo , we get
= 2(oo)+4
= oo

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