Периодическая функция определена для всех действительных чисел. Её период равен 2 и f(1)=5. Найди значение выражения 5f(7)−12f(−3).
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07.10.2021 22:47
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f(7)=f(1+2×3)=f(1+3T)=f(1)=5
f(-3)=f(1-2×2)=f(1-2T)=f(1)=5
5×5-12×5=-7×5=-35
ответ: -35