Q68.The sum of the coefficients of three consecutive terms in the binomial expansion of (1 + x)n+2 , which are in the ratio 1 : 3 : 5 , is equal to (1) 92 (2) 63 (3) 41 (4) 25
What This Question Tests
This question tests the relationships between consecutive binomial coefficients, requiring the use of their ratio formula to solve for 'n' and then calculate the sum of the coefficients.
Concepts Tested
Formulas Used
nCr / nC(r-1) = (n-r+1)/r
Sum of coefficients = (1+1)^n = 2^n
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📋 Question Details
- Chapter
- Binomial Theorem
- Topic
- Properties of binomial coefficients
- Year
- 2023
- Shift
- 11 Apr Shift 2
- Q Number
- Q68
- Type
- MCQ
- NCERT Ref
- Class 11 Mathematics Ch 8: Binomial Theorem
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