## anonymous 3 years ago find constan a and b

1. anonymous

$\lim_{x \rightarrow 0} \frac{ \sqrt{ax+b}-1 }{ x }$ =1

2. Stacey

Have you tried rationalizing the fraction? (multilplying the both the numerator and denominator by [sqrt(ax+b) - 1] )

3. Stacey

It's not really rationalizing since it would put a radical in the denominator, but doing that often makes limits easier to solve.

4. anonymous

$\frac{ ax+b-1 }{ x(\sqrt{ax+b}+1) }$