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Mathematics

Grade10

Easy

Question

Find the coefficient of x⁸ in the expansion of (x + 2)¹¹.

640
326
1320
456

The correct answer is: 1320

STEP BY STEP SOLUTION
The coefficient of the 8^th term is ¹¹C₈ = 165.
Hence, the 8^th term of the expansion is 165 × 2³ × x⁸ = 1320x⁸,
where the coefficient is 1320.

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