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18. Which of the following is an exponential equation? A. 128 = 3* c. f(x) = 4 inx B. f(x) = x? D. x + y2 = 9
19. What possible values of x will satisfy the exponential inequality. 3* 4 D. X>6
20. What value of x will make the expression 2* equal to x?? A 1 B. 3 C 4 D. 6​


Sagot :

Answer:

If one of the data points has the form

(

0

,

a

)

(0,a), then a is the initial value. Using a, substitute the second point into the equation

f

(

x

)

=

a

(

b

)

x

f(x)=a(b)x, and solve for b.

If neither of the data points have the form

(

0

,

a

)

(0,a), substitute both points into two equations with the form

f

(

x

)

=

a

(

b

)

x

f(x)=a(b)x. Solve the resulting system of two equations in two unknowns to find a and b.

Using the a and b found in the steps above, write the exponential function in the form

f

(

x

)

=

a

(

b

)

x

Step-by-step explanation:

hope its help!