The question says,Graph the function and determine the intervals for which f(x) is greater than or equal to than 0.
f(x)=4x+2
Help pllleaseee
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The question says,Graph the function and determine the intervals for which f(x) is greater than or equal to than 0.
f(x)=4x+2
Help pllleaseee
You wrote f(x) = 4x +2. What values of this are equal to zero? How about
0 = 4x + 2?
If you solve this for x, you'll see what value of x is zero. You can then figure out what values of x make the function greater than zero.
Let me give you an example. Let's say that you have the equation
f(x) = 17x - 34
We look at the equation
0 = 17x -34
17x = 34
x = 2
So we know that f(x) = 0 for x = 2. What about x > 2? Let's try x=3
f(3) = 17 * 3 - 34 = 17 yup > 0
You can show that for any x > 2, f(x) will be greater than 0.
What about x < 2?
f(1) = 17 * 1 -34 = -17
You can also show that for any x<2, f(x) will be less than zero.
Therefore, for this equation, the intervals for which f(x) >= 0 are x= 2 to x= infinity
You can also solve this equation
17x - 34 >= 0
17x >= 34
x >= 2
We haven't divided by any negative numbers, which would reverse the sign. We've just proven what we saw, above. You do the same thing for your equation:
f(x) = 4x+2 >= 0
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