Txeee

[3]Natural🇹🇭

286 / 4,000 XP into level 3. Playing since September 2026.

League

Delta

1 promotion · 2 weeks played

Txeee Squiggles

410

Area Under the Curve · 9/36 collected

8day streak, best of 8.

Badges

7 of 58

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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)