ExamBro
ExamBro
JEE Mains · Maths · STD 11 - 6. permutation and combination

क्रमित युग्मों \(( r , k )\), जिनके लिए \(6 \cdot{ }^{35} C _{ r }=\left( k ^{2}-3\right)^{36} C _{ r +1}\), जहाँ \(k\) एक पूर्णांक हैं, की संख्या है :-

  1. A \(3\)
  2. B \(2\)
  3. C \(4\)
  4. D \(6\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(4\)

Step-by-step Solution

Detailed explanation

\(6 \times^{35} \mathrm{C}_{\mathrm{r}}=\left(\mathrm{k}^{2}-3\right)^{36} \mathrm{C}_{\mathrm{r}+1}\) \(k^{2}-3>0 \Rightarrow k^{2}>3\) \(\mathrm{k}^{2}-3=\frac{6 \mathrm{\times}^{35} \mathrm{C}_{\mathrm{r}}}{^{36} \mathrm{C}_{\mathrm{r}+1}}=\frac{\mathrm{r}+1}{6}\) Possible…
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app