which of the following statement is/are true? i  $\frac{1}{1\times3}+\frac{1}{3\times5}+\frac{1}{5\times7}$+....+$\frac{1}{11\times13}$=$\frac{12}{13}$ ii.   $\frac{1}{1\times2}+\frac{1}{2\times3}+\frac{1}{3\times4}$+....+$\frac{1}{12\times13}$=$\frac{12}{13}$

which of the following statement is/are true?

i  $\frac{1}{1\times3}+\frac{1}{3\times5}+\frac{1}{5\times7}$+....+$\frac{1}{11\times13}$=$\frac{12}{13}$

ii.   $\frac{1}{1\times2}+\frac{1}{2\times3}+\frac{1}{3\times4}$+....+$\frac{1}{12\times13}$=$\frac{12}{13}$

1). Only I
2). Onl y II
3). Both I and II
4). Neither I nor II

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