Questions
A ratio of the 5th term from the beginning to the 5th term from the end in the binomial expansion of
a
1:2(6)13
b
1:4(16)13
c
4(36)13:1
d
2(36)13:1
detailed solution
Correct option is C
Since, rth term from the end in the expansion of a binomial (r +α)n is same as the (n - r +2)th term from the beginning in the expansion of same binomial.∴ Required ratio =T5T10−5+2=T5T7=T4+1T6+1⇒ T5T10−5+2= 10C421/310−412(3)1/34 10C621/310−612(3)1/36∵Tr+1=nCrxn−rar∵10C4=10C6=26/32(3)1/3624/32(3)1/34=26/3−4/32(3)1/36−4=223⋅22⋅323=4(6)23=4(36)1/3So, the required ratio is. 4(36)1/3:1Talk to our academic expert!
Similar Questions
lf the term independent of x in the expansion of is k, then 18k is equal to
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
Popular Books
HC Verma Part 1HC Verma Part 2RS AgarwalRD SharmaLakhmir SinghDK GoelSandeep GargTS GrewalNCERT solutions
Class 12 NCERT SolutionsClass 11 NCERT SolutionsClass 10 NCERT SolutionsClass 9 NCERT SolutionsClass 8 NCERT SolutionsClass 7 NCERT SolutionsClass 6 NCERT Solutions
