I want to calculate a limit of fn=exsin(x)sin(2x)⋯sin(nx)√n if n goes to an infinity.
I was wondering if I can use this: limn→∞sin(nx)n=0, because I have doubts.
I know that limx→x0f(x)g(x)=limx→x0g(x)limx→x0f(x)
(or I suppose), but what if the limit of f(x) or g(x) is zero
My attempt of a solution:
limn→∞exsin(x)sin(2x)...sin(nx)√n=limn→∞√nexsin(x)sin(2x)...sin(nx)n=limn→∞√nexsin(x)sin(2x)sin(nx)n=limn→∞√nexsin(x)sin(2x)∗0=0
And the range for the convergence is ∞ , right?
Answer
Hint: sin(x) is always between 1 and 0. But the denominator keeps getting larger as n goes to infinity.
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