Which of the following is true about f(x) and g(x)? A.
f(x) and g(x) are closed under addition because when added, the result will not be a polynomial.
B.
f(x) and g(x) are not closed under addition because when added, the result will be a polynomial.
C.
f(x) and g(x) are closed under addition because when added, the result will be a polynomial.
D.
f(x) and g(x) are not closed under addition because when added, the result will not be a polynomial.

i hope this is what you were looking for.

see attached graph

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places