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JEE Mains · Maths · STD 11 - 8. sequence and series

श्रेणी \(\frac{1}{1-3 \cdot 1^2+1^4}+\frac{2}{1-3 \cdot 2^2+2^4}+\) \(\frac{3}{1-3 \cdot 3^2+3^4}+\ldots .10\) पदों तक का योग ........... है।

  1. A \(\frac{45}{109}\)
  2. B \(-\frac{45}{109}\)
  3. C \(\frac{55}{109}\)
  4. D \(-\frac{55}{109}\)
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Answer & Solution

Correct Answer

(D) \(-\frac{55}{109}\)

Step-by-step Solution

Detailed explanation

General term of the sequence, \(\mathrm{T}_{\mathrm{r}}=\frac{\mathrm{r}}{1-3 \mathrm{r}^2+\mathrm{r}^4}\) \(\mathrm{~T}_{\mathrm{r}}=\frac{\mathrm{r}}{\mathrm{r}^4-2 \mathrm{r}^2+1-\mathrm{r}^2}\)…
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