Question

求最大值：|k|*根号(1-k^2)/(1+t^2)

Answer 1

T=|k|√(1-k^2)/（1+k^2)T^2=k^2*(1-k^2)/(k^4+2k^2+1)设t=k^2,则T^2=t*（1-t）/（t^2+2t+1)T^2=(-（t+1）^2+3(t+1)-2)/(t+1)^2设1/(t+1)=x则T^2=-1+3x-2x^2未知量的范围：k^2《1,即0《t《1,0.5《x《1根据二次函数求...