find x + y – 4 V2r – y – 2 18. lim (x, y)→(2,2) Vx + y – 2 x+y#4 19. lim (, у) - (2,0) 2х —у — 4 2r-y+4 Vx - Vy + 1 х — у — 1 20. lim (х, у) —(4,3) x+y+1 sin (x² + y²) 1 - cos (xy) 21. lim 22. lim (х, у) —— (0,0) x? + y? (х, у) —(0,0) xy x³ + y3 х — у 23. lim (х, у) ——(1,-1) х +у 24. lim (х, у) —-(2,2) х* - у4

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