Răspuns :
f = x· ( 2x +3 )² rad 0 , - 3/2 , -3 /2
f= ( x +1 ) · ( x -5) ² rad -1 , 5 ,5
f = ( x -2 ) · ( x -6 ) ² 2 , 6 , 6
f= ( x +1 ) · ( x -5) ² rad -1 , 5 ,5
f = ( x -2 ) · ( x -6 ) ² 2 , 6 , 6