How would you find the sum of coefficients in this?
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How would you find the sum of the coefficients in: (2x + 9y)^6
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Answer:
The easiest way is to let x = y = 1. The result will be the sum of the coefficients. So the sum of the coefficients in the expansion of (2x + 9y)^6 is: [2(1) + 9(1)]^6 = (2 + 9)^6 = 11^6 = 1771561. <== ANSWER I hope this helps!
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