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What does i^7 equal?
\n" ); document.write( "It means i raised to the 7 power.
\n" ); document.write( "i is the sqrt of minus 1
\n" ); document.write( "so i^2=-1
\n" ); document.write( "so if you square -1 [ (-1)^2 }you get plus one
\n" ); document.write( "minus times a minus is a plus
\n" ); document.write( "that is i^4
\n" ); document.write( "but i^2=-1
\n" ); document.write( "we are at i^6 { i^4*i^2}
\n" ); document.write( "so now we have -1 again
\n" ); document.write( "but we multiply by i again (i^7) and we have -i\r
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