Mathematics · Binomial Theorem

The coefficient of x7 in the expansion (1 + x)10 + x(1 + x)9 + x2(1 + x)8 + ... + x10 is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1420
2120
3210
4330✓

Correct answer

330

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The coefficient of x7 in the expansion (1 + x)10 + x(1 + x)9 + x2(1 + x)8 + ... + x10 is:

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The coefficient of x7 in the expansion (1 + x)10 + x(1 + x)9 + x2(1 + x)8 + ... + x10 is:

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