Известно , что 3x³y=4.Найдите 1) 21x³y
2) -6x-³y
3) 8x∧-9*y^-3
4) -2/7 x^6 y²
5) 8x^-9 y^-3
6) 5x^-6 y^-2
За правильное решение даю 99 баллов
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