math help: lim(x->pie/2) f(x) - Help.com



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lim(x->pie/2) f(x)

f(x)=(3^sinx)/(x^2-1)

i understand that 3^sinx would equal 3, but how would i plug in pie/2 into the denominator?

This open post was written 1 year, 2 months ago | V/U/S: 317, 11, 2 | Edit Post | Leave a reply | Report Post


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Pie, equality, fraction, plug, math, Trignometry, limits (How Tags Affect Reciprocity)

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R.A.M offline Verified User (1 year, 3 months) Long Term User Shouts: 2 #
An Unknown Location | 1 year, 2 months ago (7 minutes after post)

keep it at (pi/2)^2
you get an answer like 2.04

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noor_ul_waha offline Unverified User #
An Unknown Location | 1 year, 2 months ago (10 minutes after post)

this is supposed to be done without a calculator..i got 2.04 with a calculator but im guessing there’s another way to do it without one

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R.A.M offline Verified User (1 year, 3 months) Long Term User Shouts: 2 #
An Unknown Location | 1 year, 2 months ago (13 minutes after post)

well…
then just put pi^2 /4 - 1
or 12/(pi^2 - 4)
=12/(pi-2)(pi+2)

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noor_ul_waha offline Unverified User #
An Unknown Location | 1 year, 2 months ago (21 minutes after post)

thanks for ur help! but im supposed to use some stupid theorem(s) to find the answer, the teacher did it in class and actually got a answer and it was an integer

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noor_ul_waha offline Unverified User #
An Unknown Location | 1 year, 2 months ago (28 minutes after post)

im guessing squeeze theorem wouldnt work?

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R.A.M offline Verified User (1 year, 3 months) Long Term User Shouts: 2 #
An Unknown Location | 1 year, 2 months ago (31 minutes after post)

Hmm!
Cant remember my limits formulae sorry…
But try splitting x^2-1 into (x-1)(x+1)
then anything works?
Squeeze wont work if Im right (since sin is cyclic)…

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noor_ul_waha offline Unverified User #
An Unknown Location | 1 year, 2 months ago (38 minutes after post)

i’ll try that..thanks alot for ur help !

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R.A.M offline Verified User (1 year, 3 months) Long Term User Shouts: 2 #
An Unknown Location | 1 year, 2 months ago (41 minutes after post)

Hey!
NP…

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Nante offline Verified User (1 year, 6 months) Long Term User Shouts: 29 #
An Unknown Location | 1 year, 2 months ago (1 hour, 24 minutes after post)

I stopped paying attention at pie…

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noor_ul_waha offline Unverified User #
An Unknown Location | 1 year, 2 months ago (12 hours, 30 minutes after post)

pie’s good

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Nante offline Verified User (1 year, 6 months) Long Term User Shouts: 29 #
An Unknown Location | 1 year, 2 months ago (15 hours, 13 minutes after post)

Hell yeah!

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