document.write( "Question 846062: Please help me solve this problem: What is the coefficient of x^7 in (3 + x)^12 \n" ); document.write( "

Algebra.Com's Answer #509581 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Use Pascal's triangle.
\n" ); document.write( "The coefficients would be
\n" ); document.write( " $\"x%5E12+-+1\"$
\n" ); document.write( " $\"x%5E11+-12\"$
\n" ); document.write( " $\"x%5E10+-66\"$
\n" ); document.write( " $\"x%5E9+-220\"$
\n" ); document.write( " $\"x%5E8+-495\"$
\n" ); document.write( " $\"x%5E7-792\"$
\n" ); document.write( " $\"x%5E6-924\"$
\n" ); document.write( " $\"x%5E5-792\"$
\n" ); document.write( " $\"x%5E4-495\"$
\n" ); document.write( " $\"x%5E3-220\"$
\n" ); document.write( " $\"x%5E2-66\"$
\n" ); document.write( " $\"x%5E1-12\"$
\n" ); document.write( " $\"x%5E0-1\"$
\n" ); document.write( " \n" ); document.write( "

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