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OpenStudy (anonymous):
what is the sum of the coefficients of the expansion of (2x-1)^20? some answers 1 and some 0..what is the right answer?
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OpenStudy (anonymous):
0 Refer to the solution attachment.
Directrix (directrix):
I think it is (2 - 1) ^ 20 = 1^20 = 1. I need to look up a theorem.
OpenStudy (anonymous):
thank you
OpenStudy (anonymous):
Thank you for the medal.
OpenStudy (anonymous):
:) welcome
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