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October 5th, 2007, 09:18 AM
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| | Not L'Hopital rule limx->infinite ((9X+1)^1/2)/((X+1)^1/2)
limx->90'- secX/tanx
what it means by putting positive and negative behind?how to solve by using other way? | 
October 5th, 2007, 09:50 AM
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| | Quote:
Originally Posted by Joyce limx->infinite ((9X+1)^1/2)/((X+1)^1/2)
... | Hi,  = 3 | 
October 5th, 2007, 12:08 PM
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| | Quote:
Originally Posted by Joyce ...
limx->90'- secX/tanx
what it means by putting positive and negative behind?how to solve by using other way? | Hi, Quote:
Originally Posted by Joyce what it means by putting positive and negative behind?how to solve by using other way? | I only can guess because I don't know this way of writing: Probably the - or + sign indicates the direction of approach. So 90°- could mean that you approaches the 90° from the left where the values are smaller than 90°. Ask your teacher or try to find an explanation in your textbook. | 
October 5th, 2007, 12:29 PM
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| | Hello, Joyce!
Another approach . . .
We have: .
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