# 如何用方程式写春联

jopen 7年前

x^4+y^4<25 倒是刚刚好

x^4+y^4+100/(x^4+y^4)<25 的图案长这样

(-5y+2(x/4)^4+100/((x/4)^4+ (2(x/4)-2)^4))(-5y+25)=0

(-5y+2(x/4)^4+100/((x/4)^4+ (2(x/4)-2)^4+ (2(x/4)-1)^2))(-5y+25)=0

x^4+y^4+100/(x^4+ (2y-2)^4+ (2y-1)^2) +100/(x^4+ (2y+2)^4+ (2y+1)^2)<25

（知道这三条分别对应到哪一项吗？）

x^4+y^4-1/((y+3)^4+ (x/15)^4)-1/((y+4)^4+ (x/15)^4)-1/((y+5)^4+ (x/15)^4)<25

x^4+y^4+100/(x^4+ (2y-2)^4+ (2y-1)^2) +100/(x^4+ (2y+2)^4+ (2y+1)^2)-1/((y+3)^4+ (x/15)^4)-1/((y+4)^4+ (x/15)^4)-1/((y+5)^4+ (x/15)^4)<25

(-50x+y^4+100/((2y-2)^4+ (2y-1)^2) +100/((2y+2)^4+

(2y+1)^2)-1/((y+3)^4)-1/((y+4)^4)-1/((y+5)^4))(-50x+25)=0

-1/(4(x+4)^4+ ((y+1)/5)^4)<-100

-1/(4(x+y+4)^4+ ((x-y+1)/5)^4)<-100

((x-4)^2+ (y+5)^2-13)((x-19)^2+ (y+12)^2-400)=0

((x-4)^2+ (y+5)^2-13)^2+ ((x-19)^2+ (y+12)^2-400)^2<100

-100/(((x-4)^2+ (y+5)^2-13)^2+ ((x-19)^2+ (y+12)^2-400)^2)<-1

（需要看看它的样子吗？我猜是不用。）

-100^16/(((x-4)^2+ (y+5)^2-13)^2+ ((x-19)^2+ (y+12)^2-400)^2)^16<-100

（这个图形和前一个一样吗？）（如果不，那它为什么和前一个那么像？）

x^4+y^4+100/(x^4+ (2y-2)^4+ (2y-1)^2) +100/(x^4+ (2y+2)^4+ (2y+1)^2)-1/((y+3)^4+ (x/15)^4)-1/((y+4)^4+ (x/15)^4)-1/((y+5)^4+ (x/15)^4)-1/(4(x+y+4)^4+ ((x-y+1)/5)^4)-100^16/(((x-4)^2+ (y+5)^2-13)^2+ ((x-19)^2+ (y+12)^2-400)^2)^16<25

x^4+y^4+100/(x^4+ (2y-2)^4+ (2y-1)^2) +100/(x^4+ (2y+2)^4+ (2y+1)^2)-1/((y+3)^4+ (x/15)^4)-1/((y+4)^4+ (x/15)^4)-1/((y+5)^4+ (x/15)^4)-1/(4(x+y+4)^4+ ((x-y+1)/5)^4)-100^16/(((x-4)^2+ (y+5)^2-13)^2+ ((x-19)^2+ (y+12)^2-400)^2)^16-25