Question
The limit has a finite value for a real α. The value of α and the corresponding limit p are
Options :
α = −3π, and p = π
α = −2π, and p = 2π
α = π, and p = π
α = 2π, and p = 3π
Answer :
α = −3π, and p = π
Solution :
substitue x = π
, sin π = 0 We can see that denominator becomes zero.
Thus for p to have finite value numerator is also zero.
π2 + απ + 2π2 = 0
α = - 3π
form
Using L'Hospital's rule, we get
substituting x = π, α = - 3π
p =
p = Π
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