Question

Заданы функции f(x)=5-x/2 и g(x)=7-2x. Сравните. f(-9) и g(-9)

Answer 1

f(x)=5-x/2 
g(x)=7-2x.
f(-9) -? 
g(-9)-?
Підставляємо значення у функції :
f(-9) = 5 -(-9/2) = 5 + 9/2 = 9.5
g(-9) = 7 -2*(-9) = 7 + 18 = 25
Виходить, що у точці х = - 9 : g(-9) > f(-9)

Answer 2

To compare the values of functions f(x) and g(x) at a specific point, we simply need to evaluate each function at that point.

Given the functions:

1. f(x) = 5 - x/2
2. g(x) = 7 - 2x

We need to compare f(-9) and g(-9). Let's calculate the values:

1. f(-9) = 5 - (-9)/2 = 5 + 9/2 = 5 + 4.5 = 9.5
2. g(-9) = 7 - 2*(-9) = 7 + 18 = 25

So, f(-9) = 9.5 and g(-9) = 25. Therefore, f(-9) is less than g(-9).