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

જો શ્રેણી \(\frac{4.1}{1+4.1^4}+\frac{4.2}{1+4.2^4}+\frac{4.3}{1+4.3^4}+\ldots\) ના પ્રથમ 10 પદોનો સરવાળો \(\frac{m}{n}\) હોય, જ્યાં \(\operatorname{gcd}(m, n)=1\) છે, તો \(m+n\) = __________

  1. A 440
  2. B 441
  3. C 442
  4. D 443
Verified Solution

Answer & Solution

Correct Answer

(B) 441

Step-by-step Solution

Detailed explanation

\begin{aligned} & \mathrm{T}_{\mathrm{r}}=\frac{4 . \mathrm{r}}{1+4 . \mathrm{r}^4} \\ & \mathrm{~T}_{\mathrm{r}}=\frac{4 . \mathrm{r}}{\left(2 \mathrm{r}^2+2 \mathrm{r}+1\right)\left(2 \mathrm{r}^2-2 \mathrm{r}+1\right)} \\ & \mathrm{T}_{\mathrm{r}}=\frac{\left(2 \mathrm{r}^2+2…

Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app