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Problem
Problem
Let
L
=
lim
x
→
0
a
−
a
2
−
x
2
−
x
2
4
x
4
L = \lim_{x \to 0} \frac{a - \sqrt{a^2 - x^2} - \frac{x^2}{4}}{x^4}
L
=
lim
x
→
0
x
4
a
−
a
2
−
x
2
−
4
x
2
,
a
>
0
a > 0
a
>
0
. If
L
L
L
is finite, then a.
a
=
2
a = 2
a
=
2
b.
a
=
1
a = 1
a
=
1
c.
L
=
1
64
L = \frac{1}{64}
L
=
64
1
d.
L
=
1
32
L = \frac{1}{32}
L
=
32
1
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