document.write( "Question 762771: Find all geometric sequences in which t3 + t4 = 36 and t5 + t6 = 144\r
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\n" ); document.write( "\n" ); document.write( "I know one could be t1=3 t2=6 t3=12 t4=24 t5=48 t6=96\r
\n" ); document.write( "\n" ); document.write( "That would fit the question, but i'm assuming there's more than one geometric sequence that fits? There is two questions like this on my assignment. Don't know how to go about finding multiple sequences
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Algebra.Com's Answer #464363 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
The way to solved it could be this one:
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\n" ); document.write( "\"Ar%5E2+%2B+Ar%5E3+=+36\" and
\n" ); document.write( "\"Ar%5E4+%2B+Ar%5E5+=+144\"
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\n" ); document.write( "These can be factored to \r
\n" ); document.write( "\n" ); document.write( "\"Ar%5E2+%28r%2B1%29+=+36\" and
\n" ); document.write( "\"Ar%5E4+%28r%2B1%29+=144\"\r
\n" ); document.write( "\n" ); document.write( "Therefore, \r
\n" ); document.write( "\n" ); document.write( "\"r%2B1+=+36%2F%28Ar%5E2%29\" and
\n" ); document.write( "\"r%2B1+=+144%28Ar%5E4%29\"
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\n" ); document.write( "Setting these equal to each other and cross multiplying gives \r
\n" ); document.write( "\n" ); document.write( "\"144Ar%5E2+=+36Ar%5E4\", or
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\n" ); document.write( "\"4Ar%5E2=Ar%5E4\"
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\n" ); document.write( "One solution is for \"r\" to be \"0\", but that obviously won't work.
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\n" ); document.write( "So, dividing through by \"Ar%5E2\" gives \"4=r%5E2\", so \"r\" can be either \"2\" or \"-2\".
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\n" ); document.write( "Using these with the previous equations gives the value of \"A\",
\n" ); document.write( "and therefore the sequence.\r
\n" ); document.write( "\n" ); document.write( "\"A%2A2%5E2+%2B+A%2A2%5E3+=+36\" ..=>\"4A+%2B+8A+=+36\"..=>\"12A+=+36\"..=>\"A+=+36%2F12\"..=>\"A+=+3\"\r
\n" ); document.write( "\n" ); document.write( "same here\r
\n" ); document.write( "\n" ); document.write( "\"A%2A2%5E4+%2B+A%2A2%5E5+=+144\"..=>\"16A%2B32A=144\"..=>\"48A=144\"..=>\"A=144%2F48\"..=>\"A=3\"\r
\n" ); document.write( "\n" ); document.write( "geometric sequences is\r
\n" ); document.write( "\n" ); document.write( "\"Ar%5E0=t1=3%2A1=3+\"
\n" ); document.write( "\"Ar%5E1=t2=3%2A2=6+\"
\n" ); document.write( "\"Ar%5E2=t3=+3%2A4=12\"
\n" ); document.write( "\"Ar%5E3=t4=3%2A8=24\"
\n" ); document.write( "\"Ar%5E4=t5=3%2A16=48\"
\n" ); document.write( "\"Ar%5E5=t6=3%2A32=96\"
\n" ); document.write( "\"Ar%5E6=t7=3%2A64=192\"...and so on\r
\n" ); document.write( "\n" ); document.write( "check if \"t3+%2B+t4+=+36\" and \"t5+%2B+t6+=+144\"\r
\n" ); document.write( "\n" ); document.write( "\"12+%2B+24+=+36\"
\n" ); document.write( "\"36=+36\"\r
\n" ); document.write( "\n" ); document.write( "\"48+%2B+96+=+144\"
\n" ); document.write( "\"144+=+144\"\r
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