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.

Secant

Two points and a rough idea.

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

The group

1 [7]Vincent0705↑2,937pts
2 [11]Atiksh↑2,303pts
above this line moves up
3 [7]SergeyCs1,000pts
4 [51]blahdah1,000pts
5 [7]space618839pts
below this line drops
6 [19]Mathgineer↓250pts

← Back to your league

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)