NCERT solutions for CBSE and other state boards is a key requirement for students. Doubtnut helps with homework, doubts and solutions to all the questions. It has helped students get under AIR 100 in NEET & IIT JEE. Get PDF and video solutions of IIT-JEE Mains & Advanced previous year pap...
NCERT solutions for CBSE and other state boards is a key requirement for students. Doubtnut helps with homework, doubts and solutions to all the questions. It has helped students get under AIR 100 in NEET & IIT JEE. Get PDF and video solutions of IIT-JEE Mains & Advanced previous year pap...
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nCr+4nCr−1+6nCr−2+4nCr−3+nCr−4=n+4CrSolution in Malayalam Video Solution free crash course Study and Revise for your exams Unlock now | ShareSave Answer Step by step video & image solution for Prove that ""^nC_r+4^nC_(r-1)+6^(n)C_(r-2)+4^nC_(r-3)+^nC_(r-...
If n>2, then prove that C1(a−1)−C2×(a−2)++(−1)n−1Cn(a−n)=a,whereCr=nCr. View Solution Prove that .nCr+nCr−1=n+1Cr View Solution Knowledge Check n−2Cr+2n−2Cr−1+n−2Cr−2 equals : An+1Cr BnCr CnCr−1 Dn−1CrSubmitProve...
To prove that C1+2C2+3C3+…+nCn=n⋅2n−1, we will follow these steps: Step 1: Understand the ExpressionWe start with the expression C1+2C2+3C3+…+nCn. Here, Cr represents the binomial coefficient (nr). Step 2: Rewrite the SumWe can rewrite the sum as:S=n∑r=1r⋅Cr=n∑r...