In this article you will get chapter notes of Binomial Theorem including important concepts, formulae and previous year solved questions for WBJEE Entrance Examination 2018.
Binomial Theorem is one of the important chapters in the syllabus of WBJEE entrance examinations. About 2-3 questions are being asked from this chapter in WBJEE examination.
After the detailed analysis of the latest syllabus of Mathematics and the previous year papers of WBJEE Examination, the Subject Experts of Jaranjosh bring complete chapter notes of chapter Binomial Theorem including all important topics of chapter Binomial Theorem like binomial theorem, formula for general term in binomial expansion, formula for middle term in binomial expansion, binomial formula of some expansions etc.
About the exam:
West Bengal Joint Entrance Examination (WBJEE) is a state level common entrance test organized by West Bengal Joint Entrance Examinations Board for admission to the Undergraduate Level Engineering and Medical Courses through a common entrance test in the State of West Bengal.
Some previous years solved questions are given below:
(1+x)n = C + C1x + C2x2 + ---------+Cnxn ,
(x+1)n = Cxn + C1xn–1+C2xn–2 + ------+Cn
So, coefficient of xn in [(1+x)n × (x+1)n] i.e. (1+x)2n is ( C2 +C12+ -------+Cn2), which is 2nCn
Hence, the correct option is (D).
Hence, the correct option is (b).
Hence, the correct option is (a).
We have the binomial expression,
Except, r = 0, 15, 30, 45, 60, 75, 90 each term will give irrational terms.
So, there are 7 rational terms
Total number of terms in the given binomial expression = 101
No. of irrational terms
= 101 – 7 = 94
Hence, the correct option is (c).
Hence, the correct option is (A).