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zMaxStein
@zMaxStein
July 2022
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Для функции y= 9x -7
Найдите f(0),f(2),f(-1). Найдите значения x, при которых f(x) = 0
f(x) = 2, f(x) = -2,5
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Answers & Comments
irka1804
F(0) = 9 * 0 - 7 = 0 - 7 = -7
f(2) = 9 * 2 - 7 = 18 - 7 = 11
f(-1) = 9 * (-1) - 7 = -9 - 7 = -16
f(x) = 0
9x - 7 = 0
9x = 7
x = 7 / 9
f(x) = 2
9x - 7 = 2
9x = 9
x = 9 / 9 = 1
f(x) = -2,5
9x - 7 = -2,5
9x = 4,5
x = 4,5 / 9 = 0.5
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Answers & Comments
f(2) = 9 * 2 - 7 = 18 - 7 = 11
f(-1) = 9 * (-1) - 7 = -9 - 7 = -16
f(x) = 0
9x - 7 = 0
9x = 7
x = 7 / 9
f(x) = 2
9x - 7 = 2
9x = 9
x = 9 / 9 = 1
f(x) = -2,5
9x - 7 = -2,5
9x = 4,5
x = 4,5 / 9 = 0.5