Model Y

RMB CNY Y Y-YY="Y Y- Y= .

Model Y110 Model Y3.

Understanding the Context

y i y = i (y i y) i = (x):= y i y, = i y i y = = C e i x e i x, (e i x y) = C e 2 i x e i x y = 1 2 i C e 2 i x + C 1 y = 1 2 i C e i x.

cosx cosx -2xsinx .. :u=xy=cosuu'=2xy'=cosu'=-sinu cosx =u'y'=2x (.

Model Y Model Y .

2011 1 .

Key Insights

Y U+FFE5 U+00A5 SimSun Y .

wpsyWPSyyshift+6y.

xy1980 2000xy