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What is the coefficient of the term x7y in the expansion of (x + y)^8? a1 b8 c28 d56,
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Nov 27, 2019
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What is the coefficient of the term x7y in the expansion of (x + y)^8?
a1
b8
c28
d56,
Mathematics
high-school
Rene Xu
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Rene Xu
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The coefficient for x^7*y is equal to 8Choose7 which is 8!/7! which is 8, or answer b. Pascal's triangle may be used to capture this as well, or use the exponent as above.
Dyllan
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Dec 3, 2019
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