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If $$T_n = \frac{2(n + 2)}{n(n + 1)}$$, for n = 1, 2, 3, ..... Then $$T_6 =$$
$$\frac{8}{18}$$
$$\frac{8}{19}$$
$$\frac{8}{20}$$
$$\frac{8}{21}$$
$$T_6=\frac{2\cdot8}{6\cdot7}=\frac{8}{21}$$
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