Search for: If Cr=nCr, then value of 2C1C0+2C2C1+3C3C2+………+nCnCn−1 is If Cr=nCr, then value of 2C1C0+2C2C1+3C3C2+.........+nCnCn−1 is An(n−1)Bn(n+1)Cn2−1Dn2+1 Fill Out the Form for Expert Academic Guidance!l Grade ---Class 1Class 2Class 3Class 4Class 5Class 6Class 7Class 8Class 9Class 10Class 11Class 12 Target Exam JEENEETCBSE +91 Preferred time slot for the call ---9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8pm9 pm10pm Please indicate your interest Live ClassesBooksTest SeriesSelf Learning Language ---EnglishHindiMarathiTamilTeluguMalayalam Are you a Sri Chaitanya student? NoYes Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:CrCr−1=n!r!(n−r)!⋅(r−1)!(n−r+1)!n!=n−r+1r⇒rCrCr−1=n−r+1⇒2∑r=1n rCrCr−1=2∑r=1n (n−r+1)=n(n+1) Related content NEET Exam Centres in Punjab 2024 Kendriya Vidyalaya Fees Structure 2024-25 CUET 2024 Mock Test – Online Free Mock Test Series NEET Exam Centres in Odisha 2024 Appreciation Words Wave Optics Mind Map Alternating Current Mind Map for Class 12, JEE & NEET Paramedical Courses After Class 10 Top Courses After 12th Science with PCM, PCB and PCMB Subject Change Application in School and College