1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Akimi4 [234]
3 years ago
7

Remember to show work and explain.

Mathematics
2 answers:
Anna007 [38]3 years ago
8 0

Answer:  f(x) = 2(1/3)ˣ,   D: x is All Real Numbers,   R: y > 0

<u>Step-by-step explanation:</u>

f(x) = a(b)ˣ

  • a represents the y-intercept
  • b represents the common ratio

The graph shows the y-intercept as 2   ⇒     a = 2

f(2) \div f(1)\ \text{is the common ratio}\\\\\dfrac{2}{9}\div\dfrac{2}{3}=b\implies \dfrac{2}{9}\times\dfrac{3}{2}=b\implies \dfrac{1}{3}=b

f(x)=2\bigg(\dfrac{1}{3}\bigg)^x

Domain: there are no restrictions on the x-value ⇒ x is All Real Numbers

Range: there are no values of x that will result in the y-value being 0 or negative, so y > 0.

We can show this algebraically by taking the log of both sides of the equation.  

log y = log 2(1/3)ˣ    

<em>You cannot take the log of 0 or a negative number so y has to be greater than 0.</em>

Ostrovityanka [42]3 years ago
8 0

Using given,

f(0)=2=2/1=2/3°

f(1)=2/3=2/3¹

f(2)=2/9=2/3²

...........................

Similarly

f(x)=2/(3^x)

[Explanation: All I did here is find a pattern or behaviour of function with the help of given values of function (for x=0,1,2). You can clearly see that numerator in f(0),f(1) and f(2) remains constant while denominator follows the pattern 3ⁿ . So given function has to be equal to 2/3ⁿ]

----------------------------------------------------------------------------

Y-intercept means where does the given function cuts the graph at y-axis. It cuts y-axis at 2, so,

Y-intercept=2

----------------------------------------------------------------------------

To find common ratio,

f(1)/f(0)=(2/3)/2=1/3

f(2)/f(1)=(2/9)/(2/3)=1/3

Therefore,

common ratio=1/3

----------------------------------------------------------------------------

The equation for function will be same as function but f(x) will be replaced by y,

y=2/(3^x)➡️is the required equation

----------------------------------------------------------------------------

Since the given function is exponential function, its domain will be always (-∞,+∞) no matter what shifts or translations.

----------------------------------------------------------------------------

The graph seems to touch x-axis or the line y=0 but never reach or touch y=0 .So it doesn't quite reach y=0. Also the graph goes upward in positive direction which means it will increase infinitely in upward or positive direction. So its range will be (0,+∞) which means it will not touch y=0 line and will infinitely increase in positive or upward direction.

----------------------------------------------------------------------------

You might be interested in
A net triangular prism is shown.What is the total surface area
BabaBlast [244]
I q I I don’t Want Want do
6 0
2 years ago
Which scatterplot shows that there is a relationship between the variable x and the variable y? On a graph, points are grouped t
masya89 [10]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The London theater offers child tickets at 10$each and adult tickets at 20$ each.Mrs burham buys 34 tickets at a total cost of 5
kirill115 [55]

Answer:

A+C=34

10C+20A=570

4 0
3 years ago
What is -4/10 + 5/10
Blababa [14]
-4/10+5/10
=5/10-4/10
=1/10
5 0
3 years ago
HELP ASAP<br> Find the 15th term or the geometric sequence 7, -21, 63,
mihalych1998 [28]
<h3><u>Answer:</u></h3>

33480783

<h2><u>Step-by-step explanation:</u></h2>

<u>Finding the Common Ratio:</u>

We know that the formula for the common ratio of a GP is:

r = aₙ / (aₙ₋₁)        <em>(Where n is any integer)</em>

<em>replacing the values, taking n=2</em>

r = -21 / 7

r = -3

<u>Solving for the 15th Term:</u>

We know that the Formula for the nth term of a GP:

G(n) = a * r ⁿ⁻¹     <em>(where a is the first term and r is the common ratio)</em>

<em>replacing the values (taking n = 15 since we need the 15th term)</em>

G(15) = 7 * (-3)¹⁴

G(15) = 33480783

Hence, the 15th term of the given GP is 33480783

5 0
3 years ago
Other questions:
  • Triangle XYZ has vertices X(-6, 3), Y(4,5), and Z(-2,-1).
    11·1 answer
  • 5,10,30,60,180 what comes next after that number in the pattern
    5·2 answers
  • If a metric ton has 1,000 kilograms how much does the ship weigh in kilograms
    12·1 answer
  • Write the point-slope form of the line that passes through (5, 5) and is perpendicular to a line with a slope of 1/4.
    6·1 answer
  • A 20-foot long beam is supported by a cable at each end. The left cable is made from steel (E = 30,000,000 psi, Area = 2 in2 ) a
    10·1 answer
  • PLEASE HELP!!! parallel lines+ transversals ~ missing angle maze , I’ll give brainliest
    15·1 answer
  • How long does it take to travel 350 miles at 70 mph
    5·2 answers
  • A researcher was interested in comparing the resting heart rate of people who exercise regularly and people who do not exercise
    5·1 answer
  • What is the perimeter of JKL?
    7·1 answer
  • sally found 71 seashells on the beach she gave benny some of her seashells. she has 32 seashells lefts. how many seashells did s
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!