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OpenStudy (anonymous):
expand the binomial = (x+1)^5
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OpenStudy (sidsiddhartha):
use (x + y)5 = x^5 +5x^4 y + 10x^3 y^2 +10x^2 y^3 +5xy^4 + y^5 put y=1
OpenStudy (anonymous):
is this a identity?
OpenStudy (anonymous):
how did you do that?
OpenStudy (anonymous):
by using pascal's triangle.
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OpenStudy (anonymous):
Thank you!
OpenStudy (anonymous):
welcome .
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