NotSoSmart  Sep 27, 2017

1+0 Answers



Since   the first value we're given is, - 4   we want to look for the correct function to plug this into


Notice that the last function is only good when x > 1......so that's not the one we want

The second function is only good when  x > -4     [and  ≤ 1 ]    so....we don't want that one, either


So....the first one says it's good when  x  is less than or equal to  - 4.....so that's the one we want


So    ....puting  -4  into x^2  we get    (-4)   =  16



Then...we want to choose the correct function when x  = 4

This is obviously the last one   since it's good when  x > 1


So...plugging  4  into √ x....we get  √ 4    = 2



cool cool cool

CPhill  Sep 27, 2017

2 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details