JEE Main · 2026 · 04 Apr 2026 · Shift 2 · Binomial Theorem

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In the expansion of , if the term independent of x is . then k is equal to:
  1. (A)84✓ Correct
  2. (B)78
  3. (C)168
  4. (D)198

Answer: (A)

Solution

The general term of is . The power of is , which is zero when . The coefficient is . Setting this equal to , .

JEE Main · 2026 · 04 Apr 2026 · Shift 2 · Single correct option

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