wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Find the value of (2+1)6(21)6.

Open in App
Solution

Using binomial expansion
(2+1)6=6C023+6C1(2)5+6C2(2)4+6C3(2)3+6C4(2)2+6C5(2)1+6C6
Also, (21)6=6C0(2)66C1(2)5+6C2(2)46C3(2)3+6C4(2)26C5(2)1+6C6
Then, (2+1)6(21)6
=2{6C023+6C222+6C42+6C6}
=2{8+60+30+1}

=198

flag
Suggest Corrections
thumbs-up
2
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
What is Binomial Expansion?
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon