说说y=k/x(k≠0)y=cosx=sin(x 丌/2)
问题描述:
说说y=k/x(k≠0)y=cosx=sin(x 丌/2)
n2 2n-n2 2n=150a5=8,a7=16,求a1与公比q
答
loga[(x2^2-ax2)/(x1^2-ax1)]>0比如AD BE CF=(AB BC CA) (BC/2 CA/2 AB/2)比如f(x)=(根号下x^2-3x-4)/x 1x=1 rcosA,y=-1 rsinA,