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Algebra Difficulty 1.9 Junior Find the answer

The sum of the numerical coefficients in the expansion of the binomial (a+b)6(a+b)^6 is:

Pick one

Solution

P(1,1)=(1+1)6=26=64P(1,1)=(1+1)^6=2^6=64, C\fbox{C}

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Source: NuminaMath-1.5, licensed Apache-2.0. Statement and solution reproduced as published; topic and difficulty added by this site.