I'm trying to use L'Hopital's rule to calculate: <munder> <mo movablelimits="true" form="pre

Pamela Huerta

Pamela Huerta

Answered question

2022-06-03

I'm trying to use L'Hopital's rule to calculate:
lim x 0 + x sin x ( x sin x ) ( 3 / 2 )

Answer & Explanation

Kuehne2rcun

Kuehne2rcun

Beginner2022-06-04Added 2 answers

It might be appropriate to use the limits or infinitesimal properties of sin x at x = 0
x sin x x 3 3 !
Then
lim x 0 + sin x x ( x sin x ) 3 2 = 1 6 lim x 0 + x 3 ( x sin x ) 3 2
and
1 6 lim x 0 + x 3 ( x sin x ) 3 2 = 1 6 ( lim x 0 + x x sin x ) 3 = 1 6 ( lim x 0 + x sin x ) 3
Using the known limit
x sin x 1
one has
lim x 0 + sin x x ( x sin x ) 3 2 = 1 6

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