document.write( "Question 1097372: What is the units digit of 19^93? \n" ); document.write( "

Algebra.Com's Answer #711786 by ikleyn(52748) $\"\"$ $\"About$

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document.write( "Last digits og    form the sequence \r\n" );
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document.write( "n                            1    2    3    4    5 . . .\r\n" );
document.write( "last digits of            9    1    9    1    9 . . . \r\n" );
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document.write( "This sequence is periodic with the period length of 2.\r\n" );
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document.write( "Hence,     has the last digit 9.\r\n" );
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