katnakobzeva2
1)15x^2y При x=-1/3; y=2/5 то 15x^2y=15*(-1/3)^2*2/5=15*1/9*2/5=2 2)15/27*8*x^4*y^3=40/9*x^4*y^3 При x=3; y=-1/2 то 40/9*x^4*y^3=40/9*3^4*(-1/2)^3=40/9*81*1/8=40/9*9*1=45 3)a^4*b^2 При a=-0.1; b=500 то a^4*b^2=(-0.1)^4*500^2=0.0001*250000=25 4)-6/12*a^2*b^3=-3/4*a^2*b^3 При a=10; b=-1/2 то -3/4*a^2*b^3=-3/4*10^2*(-1/2)^3=-3/4*100*1/8=75/8=9.375
Answers & Comments
При x=-1/3; y=2/5 то 15x^2y=15*(-1/3)^2*2/5=15*1/9*2/5=2
2)15/27*8*x^4*y^3=40/9*x^4*y^3
При x=3; y=-1/2 то 40/9*x^4*y^3=40/9*3^4*(-1/2)^3=40/9*81*1/8=40/9*9*1=45
3)a^4*b^2
При a=-0.1; b=500 то a^4*b^2=(-0.1)^4*500^2=0.0001*250000=25
4)-6/12*a^2*b^3=-3/4*a^2*b^3
При a=10; b=-1/2 то -3/4*a^2*b^3=-3/4*10^2*(-1/2)^3=-3/4*100*1/8=75/8=9.375