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Precalculus
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OpenStudy (anonymous):
expand (1+3x)^4
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OpenStudy (jkristia):
do you know of pascal triangle ?
OpenStudy (anonymous):
yes i have heard of it
OpenStudy (jkristia):
I think that will help. For (a + b)^3 the row in the pascal triangle is 1, 3, 3, 1, meaning \[(1)a^3b^0 + (3)a^2b^1 + (3)a^1b^2 + (1)a^0b^3\]
OpenStudy (anonymous):
thank you very much
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