$2 \le r \le n$ के लिए,$\binom{n}{r} + 2\binom{n}{r-1} + \binom{n}{r-2}$ का मान ज्ञात कीजिए।

  • A
    $\binom{n+1}{r-1}$
  • B
    $2\binom{n+1}{r+1}$
  • C
    $2\binom{n+2}{r}$
  • D
    $\binom{n+2}{r}$

Explore More

Similar Questions

$\binom{10}{1} + \binom{10}{2} + \binom{11}{3} + \binom{12}{4} + \binom{13}{5} = \dots$

यदि ${ }^{n} C_0+\frac{1}{2}{ }^{n} C_1+\frac{1}{3}{ }^{n} C_2+\ldots+\frac{1}{n+1}{ }^{n} C_{n}=\frac{1023}{10}$ है,तो $n=$

यदि $C_r = ^{100}C_r$ है,तो $1 \cdot C_0^2 - 2 \cdot C_1^2 + 3 \cdot C_2^2 - 4 \cdot C_3^2 + \dots + 101 \cdot C_{100}^2$ का मान ज्ञात कीजिए।

श्रेणी $\frac{1}{1 \times 2} {}^{25}C_{0} + \frac{1}{2 \times 3} {}^{25}C_{1} + \frac{1}{3 \times 4} {}^{25}C_{2} + \ldots + \frac{1}{26 \times 27} {}^{25}C_{25}$ का योग है

$\frac{C_1}{2} + \frac{C_3}{4} + \frac{C_5}{6} + \dots$ का मान किसके बराबर है?

Difficult
View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo