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| Math Central | Quandaries & Queries |
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I have tried to work out this problem by using the properties of limits and the conjugate rule to simplify but I am not real sure how to approach the problem or what they are asking for any help would be greatly appreciated. |
Hi Amanda,
What you sent us was
Find numbers a and b such that
I would start by multiplying the numerator and denominator by √(ax+b) + 2 in order to rationalize the numerator. The fraction then becomes
Taking the limit of this expression as x approaches zero is a problem because the denominator approaches zero, but what happens if b = 4?
Penny
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