document.write( "Question 718071: f={(1,2)(2,-3)(3,-1)},then 2f=? \n" ); document.write( "
Algebra.Com's Answer #440763 by oscargut(2103)\"\" \"About 
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f={(1,2)(2,-3)(3,-1)},then 2f=?\r
\n" ); document.write( "\n" ); document.write( "Answer: 2f = {(1,4)(2,-6)(3,-2)}\r
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