A) y'=12x^2+5+2/x^3 y(x0)=12+5+2=17
b)y'=2+1/4x^2 y(x0)=2+1/4=2.25
<span>X ^2 y^2 - 81 ;=(xy)^2-9^2=(xy-9)(xy+9)</span>
5х-6=4х-1
5х-4х=6+1
1х=7
х=7/1
х=7
4,5х +1,25=37 1\2
4,5х =37 1\2<span>-1,25
</span><span>4,5x = 37,5 - 1,25
4,5x = 36,25
x = 36,25 : 4,5
x = 8 1/30</span>