$\mathop {\lim }\limits_{n \to \infty } \left( \frac{1}{1 \cdot 3} + \frac{1}{3 \cdot 5} + \frac{1}{5 \cdot 7} + \dots + \frac{1}{(2n - 1)(2n + 1)} \right)$ ની કિંમત શોધો.

  • A
    $1/2$
  • B
    $1/3$
  • C
    $1/4$
  • D
    આમાંથી કોઈ નહીં

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Similar Questions

જો $t_{n} = \frac{1}{4}(n+2)(n+3)$ એ $n = 1, 2, 3, \dots$ માટે હોય,તો $\frac{1}{t_{1}} + \frac{1}{t_{2}} + \frac{1}{t_{3}} + \dots + \frac{1}{t_{2003}}$ ની કિંમત શોધો.

Difficult
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જો $n = 1, 2, 3, \dots$ માટે ${t_n} = \frac{1}{4}(n + 2)(n + 3)$ હોય,તો $\frac{1}{t_1} + \frac{1}{t_2} + \frac{1}{t_3} + \dots + \frac{1}{t_{2003}} = $

Difficult
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જો શ્રેણી $\frac{1}{1 \cdot(1+d)} + \frac{1}{(1+d)(1+2d)} + \dots + \frac{1}{(1+9d)(1+10d)}$ નો સરવાળો $5$ હોય,તો $50d$ ની કિંમત શોધો:

જો $\sum_{r=1}^{n} T_{r} = \frac{(2n-1)(2n+1)(2n+3)(2n+5)}{64}$ હોય,તો $\lim_{n \rightarrow \infty} \sum_{r=1}^{n} \left(\frac{1}{T_{r}}\right)$ ની કિંમત શોધો:

$\frac{1}{3 \times 7} + \frac{1}{7 \times 11} + \frac{1}{11 \times 15} + \ldots$ $50$ પદો સુધી $=$

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