Solver GRAPH absolute value
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==section input Graph absolute value of function *[input 50 f=x^2-4] ==section solution perl $a=1; my $g = "graph( 400, 400, -10, 10, -10, 10, abs( $f ) ) "; print "{{{$g}}}<BR><CODE>$g</CODE><BR>\n"; ==section output a ==section check f=1 a=1 ==section practice perl $f = randint( 1, 3 ) . "x+(" . randint( -5, 3 ) . ")";