(Х+у)3= х^3+3х^2у+3ху^у+у^3
arcsin(-1/√2)-arcsin1+arcsin(√3/2)= -arcsin(1/√2)-π/2+π/3= -π/4-π/2+π/3=
=(-3π-6π+4π)/12= -5π/12
-7z^3*(-9z^3)*2z=126z^7. ^- это степень.
1) f(2) = 3
2k = 3
k = 1,5
2) f(3) = 15
3k = 15
k = 5
3) f(-5) = 10
- 5k = 10
k = - 2