document.write( "Question 1068107: Write the explicit formula that represents the geometric sequence -2, 8, -32, 128
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Algebra.Com's Answer #683253 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Look at each successive term compared to the previous term,
\n" ); document.write( " $\"8%2F%28-2%29=-4\"$
\n" ); document.write( " $\"%28-32%29%2F8=-4\"$
\n" ); document.write( " $\"128%2F%28-32%29=-4\"$
\n" ); document.write( "So,
\n" ); document.write( " $\"a%5Bn%5D=-2%28-4%29%5E%28n-1%29\"$
\n" ); document.write( " $\"a%5Bn%5D=-2%28-4%29%5E%28-1%29%2A%28-4%29%5E%28n%29\"$
\n" ); document.write( " $\"a%5Bn%5D=%28%28-2%29%2F%28-4%29%29%2A%28-4%29%5En\"$
\n" ); document.write( " $\"a%5Bn%5D=%281%2F2%29%28-4%29%5En\"$ \r
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