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Q:

$$ {1\over{2×5}}+{1\over {5×8}}+{1\over {8 × 11}}+......{1\over {23 × 26}}=?$$  का मान होगा

  • 1
    $$ {1\over 11}$$
  • 2
    $$ {3\over 11}$$
  • 3
    $$ {2\over 13}$$
  • 4
    $$ {4\over 11}$$
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Answer : 3. "$$ {2\over 13}$$"

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