JEE Main 2019 Mathematics question
The sum of the co-efficients of all even degree terms in x in the expansion of , (x > 1) is equal to:
Answer: (A)
Solution
Expression ; even-degree coefficients: 2[1 − 15 + 15 + 15 − 3 − 1] = 24.
The sum of the co-efficients of all even degree terms in x in the expansion of , (x > 1) is equal to:
Expression ; even-degree coefficients: 2[1 − 15 + 15 + 15 − 3 − 1] = 24.