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What is the sum of the coefficients in the expansion of (x + 1)^7?
What is the sum of the coefficients in the expansion of (x + 1)^7?
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Q1
What is the sum of the coefficients in the expansion of (x + 1)^7?
128
64
32
16
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The sum of the coefficients is found by substituting x = 1, giving (1 + 1)^7 = 2^7 = 128.
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Q: What is the sum of the coefficients in the expansion of (x + 1)^7?
Solution:
The sum of the coefficients is found by substituting x = 1, giving (1 + 1)^7 = 2^7 = 128.
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