3x^2 2xy 3y^2=1为什么是个椭圆�?感觉并化不成椭圆的标准方程。? 知乎 Template




You need a modern browser try chrome, to view this.

Background image: Hide Show

View Larger Image Image Credit: zhihu.com






Try and sketch some of theseRadio, Feather, Necklace, Fishing rod, Tower, Crazy quilt, Disco, Bounce castle, Bustle, Shoehorn, view more ideas


please wait, the page is loading...

More Sketches

Take a peek at some of the sketches created by our users, are you a sketchite?

anonymous
anonymous
sketch #5087


Jayme Sousa
sketch #2729 Luffy by Jayme Sousa


anonymous
anonymous
sketch #4532


Helyryn
sketch #293 jdjdjdjdj


anonymous
anonymous
sketch #2022


anonymous
anonymous
sketch #5027


anonymous
anonymous
sketch #933 mts


anonymous
anonymous
sketch #3258


anonymous
anonymous
sketch #3360


anonymous
anonymous
sketch #5313 Katy Perry by Monalisa Theresia


anonymous
anonymous
sketch #5062


anonymous
anonymous
sketch #1536 Dark Night


anonymous
anonymous
sketch #3174 John Snow Helga Fon Stein


anonymous
anonymous
sketch #3448 Treba mi bolji "mish " ;)


anonymous
anonymous
sketch #3626 Skream by Wellen Lima


anonymous
anonymous
sketch #3999 Deadmau by Speeð Üp Säm


anonymous
anonymous
sketch #3667


anonymous
anonymous
sketch #5368


anonymous
anonymous
sketch #5287


Raisa Mahmud
sketch #2055 Flower


Tom Kelly
sketch #15


anonymous
anonymous
sketch #3567 Worried Girl by Juvenilia Alexandrino


anonymous
anonymous
sketch #2337


anonymous
anonymous
sketch #4934 Nami-Ki Roberto Castro Colimil


anonymous
anonymous
sketch #4937 Favorite animal competition runner-up: White Tiger by Deepak Kaushik


anonymous
anonymous
sketch #4702

tomski3x^2 2xy 3y^2=1为什么是个椭圆�?感觉并化不成椭圆的标准方程。? coloring