120:12=10 прыжков.
прЕодолеть)
а) ... = 67*101*х + 78*101*у + 46*101*z= 6767х + 7878у + 4646z
б)... = 2z*7 + 7*7 + 6t*7 + 2z*4 - 1*4 - 5t*4 = 14z + 49 + 42t + 8z - 4 - 20t =
= 14z + 49 + 42t - 8z - 4 - 20t = 6z + 22t + 45
в) ... = 47000a : 100 - 9300b : 100 + 7800 : 100 = 470а - 93b + 78
6/(m^3+8)+1/m(m+2)=(6m+m^2+4-2m)/m(m^3+8)=(m+2)^2/m(m^3+8)
12/(x+6)^2+12/(x^2-36)-1/(x-6)=(12x-12*6+12x+12*6-x^2-36-12x)/(x-6)(x+6)^2=
=(x-6)^2/(6-x)(x+6)^2=(6-x)/(x+6)^2
2x/(x-1)+(3x+1)/(1-x^2)-3/(x+1)=(-2x^2-2x+3x+1-3x+3)/(1-x^2)=
=(-2x^2-2x+4)/(1-x^2)=-2(x^2+x-2)/(1-x^2)=2(1-x)(x+2)/(1-x^2)=2(x+2)/(x+1)