# Limit x->infinity

• February 11th 2013, 04:54 AM
Petrus
Limit x->infinity
Attachment 26957Hello im stuck with a question
limit x->infinity $(sqrt(x^2+ax)-sqrt(x^2+bx))$
Picture show My progress
• February 11th 2013, 05:02 AM
Plato
Re: Limit x->infinity
Quote:

Originally Posted by Petrus
Hello im stuck with a question
limit x->infinity $(\sqrt{x^2+ax}-\sqrt{x^2+bx})$

Multiply by $\frac{\sqrt{x^2+ax}+\sqrt{x^2+bx}}{\sqrt{x^2+ax}+ \sqrt{x^2+bx}}$
• February 11th 2013, 05:03 AM
Petrus
Re: Limit x->infinity
Thats what i did but im doing something wrong, can u plz look at My picture i hope u can se it
• February 11th 2013, 05:05 AM
Petrus
Re: Limit x->infinity
Nvm solved My misstake.. The misstake i did was i thought ax/x-bx/x=0-0 i was not thinking Clear there...btw ty for the help Plato