# Problem on Limits

• September 14th 2009, 07:19 AM
JP22
Problem on Limits
Can anyone give guidance and point me in the right direction for this problem? I've tried a couple approaches that have lead to dead ends and am not sure what to do. Thanks.

(SqRT(10x+9)-SqRT(79))/x-7

Limit x->7
• September 14th 2009, 07:22 AM
skeeter
Quote:

Originally Posted by JP22
Can anyone give guidance and point me in the right direction for this problem? I've tried a couple approaches that have lead to dead ends and am not sure what to do. Thanks.

(SqRT(10x+9)-SqRT(79))/x-7

Limit x->7

start by multiplying the numerator and denominator by $\sqrt{10x+9} + \sqrt{79}$
• September 14th 2009, 07:59 AM
JP22
I think I figured it out. Thanks.