NCERT Class XI Mathematics - Binomial Theorem - Solutions
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Question : 3
Total: 36
Solution:
We have, ( 2 x − 3 ) 6 = [ 2 x + ( − 3 ) ] 6
=
C 0 ( 2 x ) 6 +
C 1 ( 2 x ) 5 ( − 3 ) +
C 2 ( 2 x ) 4 ( − 3 ) 2 +
C 3 ( 2 x ) 3 ( − 3 ) 2 +
C 4 ( 2 x ) 2 ( − 3 ) 4 +
C 5 ( 2 x ) ( − 3 ) 5 +
C 6 ( − 3 ) 6
=1 ( 64 x 6 ) + 6 ( 32 x 5 ) ( − 3 ) + 15 ( 16 x 4 ) ( 9 ) + 20 ( 8 x 3 ) ( − 27 ) + 15 ( 4 x 2 ) ( 81 ) + 6 ( 2 x ) ( − 243 ) + 1 ( 729 )
=64 x 6 − 576 x 5 + 2160 x 4 − 4320 x 3 + 4860 x 3 + 4860 x 2 - 2916x + 729
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