Вычисление значений функций f(x) при заданных значениях x

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Okay, I will evaluate the functions in the image one by one.

Задание 5

Given the function $f(x) = 7 + 3x$, we need to evaluate $f(-4)$.

Substitute $x = -4$ into the function:
$f(-4) = 7 + 3(-4) = 7 - 12 = -5$

Answer: $f(-4) = -5$

Задание 6

Given the function $f(x) = 2x^2 - 5x + 3$, we need to evaluate $f(3)$.

Substitute $x = 3$ into the function:
$f(3) = 2(3)^2 - 5(3) + 3 = 2(9) - 15 + 3 = 18 - 15 + 3 = 3 + 3 = 6$

Answer: $f(3) = 6$

Задание 7

Given the function $f(x) = x^2 - 3x + 7$, we need to evaluate $f(-1)$.

Substitute $x = -1$ into the function:
$f(-1) = (-1)^2 - 3(-1) + 7 = 1 + 3 + 7 = 11$

Answer: $f(-1) = 11$

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