1-1 k^3/6
1-2 ((m^2+51)^3/2)/6
1-3 7, 25
2-1 y=0 y=-e(x-2)
2-2 답기억안남
2-3 g(x)=-e(x-2)일때 최소(이거틀린듯)
3-1 a<=-4 or a>=4 (등호넣어서 틀)
3-2 0<=k<1
3-3 -3 1 -2 1 -1 1 -2 4