Question
If f(x)= ) x^2sin((1)/(x)),&ifxneq 0 6-2k,&ifx=0 is continuous at x=0 then the value of k=
Solution
4.6
(214 Votos)
Mateo
Veterano · Tutor por 12 anos
Resposta
To determine the value of
that makes the function \( f(x) \) continuous at
, we need to ensure that the limit of \( f(x) \) as
approaches 0 is equal to \( f(0) \).First, let's find the limit of \( f(x) \) as
approaches 0:
Since \( \sin\left(\frac{1}{x}\right) \) oscillates between -1 and 1, we can use the Squeeze Theorem to evaluate this limit. We know that:
Multiplying through by
, we get:
Taking the limit of each part as
approaches 0, we get:
Therefore, by the Squeeze Theorem:
For \( f(x) \) to be continuous at
, we must have:
Given that \( f(0) = 6 - 2k \), we set this equal to the limit we found:
Solving for
:
Thus, the value of
that makes the function \( f(x) \) continuous at
is
.