Question

已知曲线y=1n(x+2)+x2/2+2x+1/2在点A处的切线与曲线y=sin(2x+ψ）,（-π/2＜ψ＜π/2)在

Answer 1

曲线1：y'=1/(x+2)+(x+2)

当x+2>0,即x>-2时,y'>=2,x=-1orx=-3(舍去)

当x+2