\r\n" );
document.write( "I will put
on the limits to show what variable the\r\n" );
document.write( "limits are on, namely x, since we will be changing the limits:\r\n" );
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document.write( "
\r\n" );
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document.write( "Let
\r\n" );
document.write( "Then
\r\n" );
document.write( "or
\r\n" );
document.write( "\r\n" );
document.write( "and
\r\n" );
document.write( "\r\n" );
document.write( "So we substitute
for
and
for
\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "And we can take out the negative sign in front of the integral:\r\n" );
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document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "But the limits are on x. We want to change the limits\r\n" );
document.write( "so that they will be on u rather than x.\r\n" );
document.write( "\r\n" );
document.write( "To do that we substitute the limits for x in the equation\r\n" );
document.write( "for u which is
\r\n" );
document.write( "\r\n" );
document.write( "when
,
and\r\n" );
document.write( "when
,
,\r\n" );
document.write( "so we change the limits to:\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "and we use the power formula
\r\n" );
document.write( " \r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Edwin
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document.write( "