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Obw= 2x + 2y
b) Obw = 2 *2a + 2 *2b
P= 2a * 2b
c) P= 120%a * 70%b= 1i 1/5x * 7/10b
d) 1/2 * p * w
e) P= 6 * k2(do potęgi 2)
V= k3(do potęgi 3)