Hi, my name's Lola. I haven't had a math course since I graduated High School in 2007 and that was Algebra 3. My college put me in Calc 1 without ever having a Pre-Calc course. I'm struggling. I'm stuck on 2 problems for my homework involving limits. I went to tutoring at my school today but the tutor had to leave early so I didn't make it through. Anyway, I read through that "show all the work you have" but I really have no idea how to even start these problems.
The first is: lim (2(a+h)^2-2a^2)/h; as x approaches 0
I know that I cannot use substitution, because you cannot divide by zero. I tried factoring but that just became a mess and I'm sure I didn't do that right.
And the 2nd:
lim (sqrt x - sqrt a)/x-a; as x approaches a
I don't even know where to get started with this one. I thought I had to get rid of the radicals but I just can't seem to.
I know the answers to these problems, they are in the back of my book. I just don't know how to get them. Any help at all would be appreciated.
Thanks
Lola
The first is: lim (2(a+h)^2-2a^2)/h; as x approaches 0
I know that I cannot use substitution, because you cannot divide by zero. I tried factoring but that just became a mess and I'm sure I didn't do that right.
And the 2nd:
lim (sqrt x - sqrt a)/x-a; as x approaches a
I don't even know where to get started with this one. I thought I had to get rid of the radicals but I just can't seem to.
I know the answers to these problems, they are in the back of my book. I just don't know how to get them. Any help at all would be appreciated.
Thanks
Lola
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