뺯̣ʱ˽涨ܵòͼɲοõʮ 
    šַĸ Сд㣬رָҪӢ״̬롣
    Ӻ +    -   ˺ *    /   ˷ ^   ( )
    ⣬Ȼȷͼ򽫿ͼ y=1.5x+20 ͼy=1.5x+2 ԡ
ٶһ㺯̣Աֱ x  y ʾһ㺯̣һдڵȺұߣ߻ͼͻٶȣ 2y-2x-1=0 ŻΪ y=(2x+1)/2  (x/3)^2+(y/2)^2=1 ŻΪ y^2=4(1-(x/3)^2) 
    һ㺯̣УͼԲ̫áԭǻͼͻٶȲ׼ãдԲ̫ʱɵߡť
    ڶڲ̣Ա t ʾ x  y ʾӢķֺŷָ x=3cos(t) ; y=4sin(t)
۶ڼ귽̣Ա t ʾ r ʾ r=4/(1+0.5cos(t)) 
    עΪ뷽㿼ǣʹæȺͦѡ
    ֧ VB6 ѧ abssincossqrlogexp ȣЩѧѧ̿Ҫ֮ͬţ4ƽӦsqr(4)sqr4ĸ P ԲʦУ3.14159ĸ e Ȼĵף2.71828VBֱ֧cotcot(x)=1/tan(x) y=cot(x) Ϊ y=1/tan(x)
    VB6еlogѧеlnȻԳeΪĶʹû׹ʽ10Ϊĳölog(x)/log(10)2ΪĶlog(x)/log(2)
    expeΪ׵ָ
    absʾֵ||, y=|x^2+x-2|+x Ӧ  y=abs(x^2+x-2)+x 
    VB6ṩݺԷָƣ y=x^(1/3)ͼ񻭲Ӧ԰취
    ʹñרŶķָݺ sp(x,m,n) ൱ x^(m/n) 
    ͬĺдֹܲһ֣磬y=3x-2дy-3x+2=0ǰ߻Ŀһͼϸߡ
    עͬĲͬдԭϻͼӦһʵֵķͬĳЩʵַyxӰ죬ͼϸ΢
    ˳ָñͼ
     r=3 (Sin(2t)+2Sin(3t))   
    귽 x=4Cos(2t)Sin(t) ; y=4Sin(2t)Sin(t)
    ̣λƣɹɱȽϸӵͼ
    