NCERT Class XI Mathematics - Binomial Theorem - Solutions
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Question : 14
Total: 36
Prove that
3 r
C r 4 n
Solution:
We have ,
3 r
C r
C 3 0 +
C 1 3 1 +
C 2 3 2
C n 3 n
=( 1 + 3 ) n
C 0 a 0 +
C 1 a
C n a n ( 1 + a ) n
Hence proved.
=
Hence proved.
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