Email
Chat with tutors
logo

Ask Questions, Get Answers

X
 
Answer
Comment
Share
Q)

$^nC_r+2.^nC_{r-1}+^nC_{r-2}=?$

$\begin{array}{1 1} =^{n+2}C_{r} \\ =^{n+2}C_{r+1} \\ =^{n+1}C_{r+1} \\ =^{n+1}C_{r} \end{array}$

1 Answer

Home Ask Tuition Questions
Your payment for is successful.
Continue
...