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Mathematics
Mathematics
Problem
Determine
lim
x
→
0
sec
2
(
3
x
)
−
1
x
2
\displaystyle \lim_{x\to 0} \frac{\sec^{2}(3x)-1}{x^{2}}
x
→
0
lim
x
2
sec
2
(
3
x
)
−
1
.
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