Question
Form the differential equation from the relation $x^2+4 y^2=4 b^2$.
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| Group | Food | Clothing | Fuel & Lighting | House Rent | Miscellaneous |
| I | 200 | 150 | 120 | 180 | 160 |
| W | 30 | 20 | 10 | 40 | 50 |
| p | q | r | q → r | r → p | (q → r) ˅ (r → p) |
| T | T | T | T | $\square$ | T |
| T | T | F | F | $\square$ | $\square$ |
| T | F | T | T | $\square$ | T |
| T | F | F | T | $\square$ | $\square$ |
| F | T | T | $\square$ | F | T |
| F | T | F | $\square$ | T | $\square$ |
| F | F | T | $\square$ | F | T |
| F | F | F | $\square$ | T | $\square$ |
| X | -3 | -2 | -1 | 0 | 1 | 2 | 3 |
| P(X=x) | 0.05 | 0.1 | 0.15 | 0.20 | 0.25 | 0.15 | 0.1 |