Evaluate
lim
h
→
0
1
3
(
x
+
h
)
2
−
1
3
x
2
h
\displaystyle \lim_{{{h}\rightarrow{0}}}\frac{{\frac{{1}}{{{3}{\left({x}+{h}\right)}^{{2}}}}-\frac{{1}}{{{3}{x}^{{2}}}}}}{{h}}
h
→
0
lim
h
3
(
x
+
h
)
2
1
−
3
x
2
1
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Question 6
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