702 of 1,000 players

Curve Sprint is unlocked. 298 more to head-to-head Battles.

Leagues

Ten players, one week. The top of each group moves up on Monday, and fewer go up the higher you climb.

This week ends in6d 17hResults and new groups at midnight UTC, Sunday into Monday.

Delta

Given an epsilon, find one.

6 players, 1 group. Top 3 of each group go up, bottom 2 drop.

The group

1 [2]undefinedcritter↑964pts
2 [1]3141592653589↑500pts
above this line moves up
3 [13]cone349pts
4 [1]nazarriesta250pts
5 [3]Txeee180pts
below this line drops
6 [1]Marsh_Proot↓117pts

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Today's problem

\frac{d}{d x} [- 4 x - \frac{5}{x ^{2}}]

The hard one · double XP

For f (x, y) = 4 x^{2} + 2 x y^{2} - 11 y^{2}, find f_{xx} f_{y y} - (f_{x y})^{2} at (0, 2)