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C/m:
a\ [TEX]\frac{1}{2^2}+\frac{1}{4^2}+\frac{1}{6^2}+...+ \frac{1}{4n^2} < \frac{1}{2}[/TEX]
b\ [TEX]\frac{1}{3^2}+\frac{1}{5^2}+\frac{1}{7^2}+...+ \frac{1}{(2n+1)^2} < \frac{1}{2}[/TEX]
thank you

a\ [TEX]\frac{1}{2^2}+\frac{1}{4^2}+\frac{1}{6^2}+...+ \frac{1}{4n^2} < \frac{1}{2}[/TEX]
b\ [TEX]\frac{1}{3^2}+\frac{1}{5^2}+\frac{1}{7^2}+...+ \frac{1}{(2n+1)^2} < \frac{1}{2}[/TEX]
thank you
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