64x^2-(x-1)^2 =
= 64x^2 -(x^2-2x+1) =
= 64x^2-x^2+2x-1 =
= 63x^2+2x-1
1)D(y)∈[-2,5;6,5]
2)[-1;2,25] U [5,25;6,5]
3)y=-2 U y=4
4)возр (1;3,5)
убыв [-2,5;1) U (3,5;6,5]
5)yнаиб=4,5
унаим=-2
(х-5)+4х=25 х2-10х+25+4х=25 х2-10х+25+4х-25=0 х2-6х=0 х(х-6)=0 х1=0 х-6=0 х2=6
= 10.5+ (-18/5)(-143/45+89/60) = 10.5+(-18/5*(-143/45))+(-18/5*89/60) =
= 10.5 + 11.4 - 5.34 = 16.56