JEE Main 2024 Mathematics question
If the term independent of x in the expansion of is 105, then a² is equal to:
Answer: (A)
Solution
= C(10, r)(√/ ; the constant term needs r = 4: 210·a³·(1/16) = 105 ⇒ a³ = 8, a = 2 and a² = 4.
If the term independent of x in the expansion of is 105, then a² is equal to:
= C(10, r)(√/ ; the constant term needs r = 4: 210·a³·(1/16) = 105 ⇒ a³ = 8, a = 2 and a² = 4.