FInd the Domain of this exponential function

Question

y= -9 x 7^x

Answer 1

I'm assuming you meant:

y = -9*7^x

 

Domain:

x lies in all Real numbers.

(Since you can have x be any number and 7^x will be a number)

 

Range:

y lies in all negative numbers: y < 0 (approaches zero as x approaches -infinity).

This is because 7^x is always positive (remember that when x is negative, the value is (1/7)^z where z is positive x), and -9 makes the result always negative.

 

 

Answer 2

Hi Korey....did you make a typo???