Question 137469
The question is find the domain of the function such as y=the square root of 7x-2.
:
y = {{{sqrt(7x - 2)}}}
:
You know that you cannot have a negative inside the square root:
You can have 0, however, then y = 0
:
7x - 2 = 0
7x = 2
x = 2/7, which is what you had
therefore the value of x has to be equal or greater than 2/7
:
Domain: x => 2/7
:
A graph would look like this:
{{{ graph( 300, 200, -4, 10, -2, 10, sqrt(7x-2)) }}}
you can see the domain: all real numbers => 2/7; note there are no values less than 2/7