- Lim 3 (x,y)→(0,0) x2 + 2y2;?

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Weather in Italy in October? Where in the interval [−2π, 2π] does 5 sin(x) = −5? Given parallelogram ABCD, diagonals AC and BD intersect at point E. AE=2x, BE=y+10, CE=x+2 and DE=4y−8. Find x? A bag contains 6 apples and 4 oranges. If you select 5 pieces of fruit without looking, how many ways can you get 5 apples? Give me some concepts on solving physics problems;when two tunning forks are sounded how to calculate the frequency of unknown .?