document.write( "Question 828528: Which term of an Arithemitc sequence 3,15,27,.......... Will be 132 more than it's 51 term \n" ); document.write( "
Algebra.Com's Answer #499366 by KMST(5328)\"\" \"About 
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MENTAL MATH ANSWER FOR MULTIPLE CHOICE TEST:
\n" ); document.write( "\"27-15=12\" and \"15-3=12\" so the common difference is \"12\".
\n" ); document.write( "Starting from the 51st term, to get to the next (52nd) term you have to add \"12\" once.
\n" ); document.write( "If you add \"12\" two times you get to the 53rd term, the term that's 2 terms after the 51st term.
\n" ); document.write( "132 ÷ 12 = 11 <---> \"11%2A12+=+132\" ,
\n" ); document.write( "so adding 132 to the 51st term is adding 12 to the 51st 11 times,
\n" ); document.write( "and that gets you the value of the the term number
\n" ); document.write( "\"51%2B11=highlight%2862%29\" .
\n" ); document.write( "
\n" ); document.write( "FANCY \"SHOW YOUR WORK ANSWER\":
\n" ); document.write( "\"a%5B1%5D=3\" , \"a%5B2%5D=15\" , \"a%5B3%5D=27\" , \"a%5Bx%5D=a%5B51%5D%2B132\" find \"x\"
\n" ); document.write( "\"d=a%5B2%5D-a%5B1%5D=15-3=12\"
\n" ); document.write( "\"a%5Bn%5D=a%5B1%5D%2B%28n-1%29%2Ad\"
\n" ); document.write( "\"a%5Bm%5D=a%5B1%5D%2B%28m-1%29%2Ad\"
\n" ); document.write( "\"a%5Bm%5D-a%5Bn%5D=a%5B1%5D%2B%28m-1%29%2Ad-%28a%5B1%5D%2B%28n-1%29%2Ad%29\"
\n" ); document.write( "\"a%5Bm%5D-a%5Bn%5D=a%5B1%5D%2B%28m-1%29%2Ad-a%5B1%5D-%28n-1%29%2Ad%29\"
\n" ); document.write( "\"a%5Bm%5D-a%5Bn%5D=%28m-1%29%2Ad-%28n-1%29%2Ad%29\"
\n" ); document.write( "\"a%5Bm%5D-a%5Bn%5D=%28%28m-1%29-%28n-1%29%29%2Ad%29\"
\n" ); document.write( "\"a%5Bm%5D-a%5Bn%5D=%28m-1-n%2B1%29%2Ad%29\"
\n" ); document.write( "\"a%5Bm%5D-a%5Bn%5D=%28m-n%29%2Ad%29\"
\n" ); document.write( "\"a%5Bx%5D=a%5B51%5D%2B%28x-51%29%2A12%29\"
\n" ); document.write( "\"a%5B51%5D%2B%28x-51%29%2A12%29=a%5B51%5D%2B132\"
\n" ); document.write( "\"%28x-51%29%2A12%29=132\"
\n" ); document.write( "\"x-51=132%2F12\"
\n" ); document.write( "\"x-51=11\"
\n" ); document.write( "\"x=51%2B11\"
\n" ); document.write( "\"highlight%28x=62%29\"
\n" ); document.write( "
\n" ); document.write( "ONE EXPECTED \"SHOW YOUR WORK ANSWER\":
\n" ); document.write( "\"a%5B1%5D=3\" , \"a%5B2%5D=15\" , \"a%5B3%5D=27\" , \"a%5Bx%5D=a%5B51%5D%2B132\" find \"x\"
\n" ); document.write( "\"d=a%5B2%5D-a%5B1%5D=15-3=12\"
\n" ); document.write( "\"a%5Bn%5D=a%5B1%5D%2B%28n-1%29%2Ad\"
\n" ); document.write( "\"a%5B51%5D=3%2B%2851-1%29%2A12\"
\n" ); document.write( "\"a%5B51%5D=3%2B50%2A12\"
\n" ); document.write( "\"a%5B51%5D=3%2B600\"
\n" ); document.write( "\"a%5Bx%5D=3%2B%28x-1%29%2A12\"
\n" ); document.write( "\"a%5Bx%5D-a%5B51%5D=3%2B%28x-1%29%2A12-%283%2B600%29\"
\n" ); document.write( "\"3%2B%28x-1%29%2A12-%283%2B600%29=132\"
\n" ); document.write( "\"%28x-1%29%2A12-600=132\"
\n" ); document.write( "\"%28x-1%29%2A12=600%2B132\"
\n" ); document.write( "\"%28x-1%29%2A12=732\"
\n" ); document.write( "\"x-1=732%2F12\"
\n" ); document.write( "\"x-1=61\"
\n" ); document.write( "\"x=61%2B1\"
\n" ); document.write( "\"highlight%28x=62%29\"
\n" ); document.write( "Notice that this answer included harder and unnecessary calculations.
\n" ); document.write( "If you like numbers better than symbols you can more unnecessary calculations, as in the solution below.
\n" ); document.write( "
\n" ); document.write( "ARITHMETIC-LOVER SOLUTION:
\n" ); document.write( "\"a%5B1%5D=3\" , \"a%5B2%5D=15\" , \"a%5B3%5D=27\" , \"a%5Bx%5D=a%5B51%5D%2B132\" find \"x\"
\n" ); document.write( "\"d=a%5B2%5D-a%5B1%5D=15-3=12\"
\n" ); document.write( "\"a%5Bn%5D=a%5B1%5D%2B%28n-1%29%2Ad\"
\n" ); document.write( "\"a%5B51%5D=3%2B%2851-1%29%2A12\"
\n" ); document.write( "\"a%5B51%5D=3%2B50%2A12\"
\n" ); document.write( "\"a%5B51%5D=3%2B600\"
\n" ); document.write( "\"a%5B51%5D=603\"
\n" ); document.write( "
\n" ); document.write( "\"x-1=61\"
\n" ); document.write( "\"x=61%2B1\"
\n" ); document.write( "\"highlight%28x=62%29\"
\n" ); document.write( "
\n" );