mf1021
College Calculus question. refer to the image please!! Thank you!!



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mf1021
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mf1021
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thank you in advance for any help!

ksaimouli
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is this l hospitals rule

mf1021
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I tried to do that. but the problem was the fraction as whole is squared
so it seems difficult to do expand and derivative

hartnn
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which part u have difficulty with ? first term 1cos x/2x or 2nd term sin5x/4x ?

mf1021
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The problem is that I can not treat them as different parts since they are squared as whole.

mf1021
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without square, I could have just take Limit separately.

hartnn
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u can bring the limit inside the square function!

mf1021
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by L hopital rule

mf1021
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what do you mean?!

hartnn
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lim (f(x)^2) = [lim f(x)]^2

mf1021
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Oh I did not know that

hartnn
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now can u solve that ?

mf1021
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then I can take limit separately and do L hopital rule

hartnn
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yep, then square the answer

mf1021
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Yep I got it. Thank you for your help

hartnn
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welcome :)