Question

Дана функция f(x)=28x-18 при каких значениях аргумента f(x)=0, f(x)<0,f(x)>0

Answer 1

f(x)=28x-18

f(x)=0 при

28x-18=0

28x=18

x=18/28=9/14

f(x)<0 при

28x-18<0

28x<18

x<9/14

f(x)>0 при

28х-18>0

x>9/14

Answer 2

F(x) = 0, при x=0,643
28x-18 = 0
28x = 18
x = 0,643

Из вышеуказанного следует:
f(x)<0 при х<0,643
f(x)>0 при х>0,643

Answer 3

To find the values of the argument x for which the function f(x) takes certain values, we need to set f(x) equal to the desired value and solve for x. Let's find the values of x when f(x) = 0, f(x) < 0, and f(x) > 0.

1. When f(x) = 0: To find the value of x when f(x) is equal to zero, we set f(x) = 0 and solve for x: 28x - 18 = 0

Add 18 to both sides to isolate 28x: 28x = 18

Now, divide by 28 to solve for x: x = 18 / 28 x ≈ 0.642857

So, when f(x) = 0, the value of x is approximately 0.642857.

2. When f(x) < 0: To find the values of x for which f(x) is less than zero, we set f(x) < 0 and solve for x: 28x - 18 < 0

Add 18 to both sides to isolate 28x: 28x < 18

Now, divide by 28 to solve for x. Remember to reverse the inequality when dividing by a negative number: x < 18 / 28 x < 0.642857

So, when f(x) < 0, the value of x is any real number less than approximately 0.642857.

3. When f(x) > 0: To find the values of x for which f(x) is greater than zero, we set f(x) > 0 and solve for x: 28x - 18 > 0

Add 18 to both sides to isolate 28x: 28x > 18

Now, divide by 28 to solve for x. Remember to reverse the inequality when dividing by a negative number: x > 18 / 28 x > 0.642857

So, when f(x) > 0, the value of x is any real number greater than approximately 0.642857.

To summarize:

• When f(x) = 0, the value of x is approximately 0.642857.
• When f(x) < 0, the value of x is any real number less than approximately 0.642857.
• When f(x) > 0, the value of x is any real number greater than approximately 0.642857.