document.write( "Question 982268: Find the possible values of the common ration if the:
\n" ); document.write( "(a) First term is 11 and the sum of the first 12 terms is 2922920
\n" ); document.write( "(b) first term is 1 and the sum of the first 6 terms is 1.24994 \n" ); document.write( "

Algebra.Com's Answer #603329 by AnlytcPhil(1806) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "The only way to do these is by using technology, such as a TI-84 or similar calculator.\r\n" );
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document.write( "Instead of doing your problems for you, I'll do a couple that are\r\n" );
document.write( "exactly like yours and you can do yours the same exact way.\r\n" );
document.write( "I'm using a TI-84.\r\n" );
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document.write( "This one is like your first one\r\n" );
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\n" ); document.write( "(a) First term is 13 and the sum of the first 10 terms is 4543825.
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document.write( "Press Y= and make it read like this:\r\n" );
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document.write( "\Y1=13(X^10-1)/(\r\n" );
document.write( "X-1)\r\n" );
document.write( "\Y2=4543825\r\n" );
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document.write( "Then press WINDOW and make it read\r\n" );
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document.write( "WINDOW\r\n" );
document.write( " Xmin=-10\r\n" );
document.write( " Xmax=10\r\n" );
document.write( " Xscl=1\r\n" );
document.write( " Ymin=-10\r\n" );
document.write( " Ymax=5000000      (Notice that I changed Ymax just larger than 4543825    \r\n" );
document.write( " Yscl=1\r\n" );
document.write( " Xres=1\r\n" );
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document.write( "Press GRAPH\r\n" );
document.write( "Press 2ND TRACE\r\n" );
document.write( "(choose 5 intersect)\r\n" );
document.write( "Press ENTER 3 times\r\n" );
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document.write( "Read at bottom of screen X=4       Y=4543825\r\n" );
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document.write( "Answer:  r=4\r\n" );
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document.write( "You can do yours the same way.\r\n" );
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document.write( "This one is like your second one:\r\n" );
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\n" ); document.write( "(b) first term is 2 and the sum of the first 7 terms is 2.856518
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document.write( "Press Y= and make it read like this:\r\n" );
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document.write( "\Y1=2(X^7-1)/(\r\n" );
document.write( "X-1)\r\n" );
document.write( "\Y2=2.856518\r\n" );
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document.write( "You don't need to set the window, just reset the window\r\n" );
document.write( "and graph by pressing ZOOM and selecting 6:ZStandard\r\n" );
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document.write( "Graph will show\r\n" );
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document.write( "Press 2ND TRACE\r\n" );
document.write( "(choose 5 intersect)\r\n" );
document.write( "Press ENTER 3 times\r\n" );
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document.write( "Read at bottom of screen X=.3       Y=2.856518\r\n" );
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document.write( "Answer:  r=0.3\r\n" );
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document.write( "You can do yours the same way. \r\n" );
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document.write( "Edwin

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