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Mathematics
Mathematics
Problem
Let
k
≠
0
k\neq 0
k
=
0
be a constant. What is
lim
x
→
k
x
3
−
k
3
x
−
k
\displaystyle \lim_{x\to k} \frac{x^{3}-k^{3}}{x-k}
x
→
k
lim
x
−
k
x
3
−
k
3
? a)
k
2
k^{2}
k
2
b)
3
k
2
3k^{2}
3
k
2
c)
2
k
2
2k^{2}
2
k
2
d)
0
0
0
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