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
lora16 [44]
3 years ago
6

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4?

Mathematics
2 answers:
astraxan [27]3 years ago
8 0
ANSWER


The value of the expression is
- 1


EXPLANATION

Method 1: Rewrite as product of
{i}^{2}


The expression given to us is,

{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}


We use the fact that
{i}^{2}  =  - 1
to simplify the above expression.



{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}  =  {i}^{0}  \times {i}^{1}  \times {i}^{3}   \times {i}^{2}   \times {i}^{4}


This implies,


{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}  =  {i}^{0}  \times {i}^{2}  \times {i}^{2}   \times {i}^{2}   \times {i}^{2} \times {i}^{2}


We substitute to obtain,

{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}  =  1\times  - 1 \times  - 1  \times  - 1\times  - 1 \times  - 1


{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}  =  1\times  1 \times   1  \times  - 1 =  - 1


Method 2: Use indices to solve.



{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}  = {i}^{0 + 1 + 2 + 3 + 4}



This implies that,


{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}  = {i}^{10}




{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}  =  (  {{i}^{2}} )^{5}


{i}^{0}  \times {i}^{1}  \times {i}^{2}  \times {i}^{3}  \times {i}^{4}  =  (   - 1 )^{5}   =  - 1


grigory [225]3 years ago
3 0

- 1

<h3>Further explanation</h3>

This is a problem that is partly related to complex numbers, i.e., imaginary numbers. We will see how the power of i is an imaginary unit. Maybe we will see an interesting pattern.

\boxed{\boxed{ \ i = \sqrt{-1}\ }} \rightarrow \boxed{\boxed{ \ i^2 = -1 \ }}

<u>Question: </u>

The value of the expression \boxed{ \ i^0 \times i^1 \times i^2 \times i^3 \times i^4 \ }

<u>The Process</u>

Recall \boxed{ \ x^0 = 1 \ }.

\boxed{ \ i^0 = 1 \ }

\boxed{ \ i^1 = \sqrt{-1} \ or \ i \ }

\boxed{ \ i^2 = (\sqrt{-1})^2 = -1 \ }

\boxed{ \ i^3 = i \times i^2 = i \times -1 = -i \ }

\boxed{ \ i^4 = i^2 \times i^2 = -1 \times -1 = 1\ }

Then \boxed{ \ i^0 \times i^1 \times i^2 \times i^3 \times i^4 = 1 \times i \times (-1) \times -i \times 1 \ }

\boxed{ \ i^0 \times i^1 \times i^2 \times i^3 \times i^4 = -1 \times -i^2 \ }

\boxed{ \ i^0 \times i^1 \times i^2 \times i^3 \times i^4 = i^2 \ }

The result is  \boxed{\boxed{ \ -1 \ }}

- - - - - - -

Another method is to use the property of indices.

\boxed{ \ x^a \cdot x^b \rightleftharpoons x^{a+b} \ } \ and \ \boxed{ \ (x^a)^b) \rightleftharpoons x^{ab} \ }

\boxed{ \ i^0 \times i^1 \times i^2 \times i^3 \times i^4 = i^{0 + 1 + 2 + 3 + 4} \ }

\boxed{ \ i^0 \times i^1 \times i^2 \times i^3 \times i^4 = i^{10} \ }

\boxed{ \ i^0 \times i^1 \times i^2 \times i^3 \times i^4 = (i^2)^5 \ }

\boxed{ \ i^0 \times i^1 \times i^2 \times i^3 \times i^4 = {-1}^5 \ }

We get the same result, i.e., \boxed{\boxed{ \ -1 \ }}

- - - - - - -

Well, now pay attention to the pattern.

\boxed{ \ i^0 = 1 \ }

\boxed{ \ i^1 = i \ }

\boxed{ \ i^2 = -1 \ }

\boxed{ \ i^3 = -i \ }

\boxed{ \ i^4 = 1\ }

\boxed{ \ i^5 = i^2 \times i^3 = i \ }

\boxed{ \ i^6 = i^2 \times i^4 = -1 \ }

\boxed{ \ i^7 = i^2 \times i^5 = -i \ }

Pattern repeat every 4^{th} power.

<h3>Learn more</h3>
  1. About complex numbers brainly.com/question/1658190
  2. The piecewise-defined functions brainly.com/question/9590016
  3. The composite function brainly.com/question/1691598

Keywords: what is the value of the expression, i⁰ × i¹ × i² × i³ × i⁴, imaginary number, unit, a complex number, the pattern, the property of indices

You might be interested in
What is the surface area of sphere with radius 13 ft?
9966 [12]
SA=4pir^2
SA=4pi13^2
SA=4pi169
SA=676pi ft^2
6 0
3 years ago
Read 2 more answers
For f(x) = 4x+1 and g(x)=x²-5, find (f-g)(x).
SSSSS [86.1K]

Answer: -x² + 4x + 6

Given:

f(x) = 4x + 1

g(x) = x² - 5

Solve:

= (f - g)(x)

= f(x) - g(x)

= 4x + 1 - (x² - 5)

= 4x + 1 - x² + 5

= -x² + 4x + 6

4 0
2 years ago
Read 2 more answers
Danae is choosing between two jobs. One job pays an annual bonus of $1,500 plus $120 per day worked. The second job pays an annu
Zigmanuir [339]

Answer:

C


Step-by-step explanation:


<u>Job A:</u>

  • Bonus of $1500
  • $120 per day for d days is 120 multiplied by d. Which is 120d
  • Total Payment = 1500+120d

<u>Job B:</u>

  • Bonus of $2500
  • $110 per day for d days is 110 multiplied by d. Which is 110d
  • Total Payment = 2500+110d

Solving these 2 equations for d would tell us after how many days both job would pay the same. Answer choice C is correct.

4 0
3 years ago
Read 2 more answers
analyze the diagram below and complete the instructions that follow. find the value of x and the value of y
Aleks [24]
Answers:
x = 2√2 units
y = 2√6 units

Explanation:
The given diagram is a right-angled triangle. This means that the special trig functions can be applied.
These functions are as follows:
sin θ = opposite / hypotenuse
cos θ = adjacent / hypotenuse
tan θ = opposite / adjacent

For getting x and y, we can choose to either work with θ = 30 or θ = 60.
I will work with 30.

1- For x:
We have:
θ = 30
x is the opposite side to θ
4√2 is the hypotenuse
Therefore, we can apply the sine function as follows:
sin θ = opposite / hypotenuse
sin (30) = x / 4√2
x = sin (30) * 4√2
x = 2√2 units

2- For y:
We have:
θ = 30
x is the adjacent side to θ
4√2 is the hypotenuse
Therefore, we can apply the cosine function as follows:
cos θ = adjacent / hypotenuse
cos (30) = y / 4√2
y = cos (30) * 4√2
y = 2√6 units

Hope this helps :)


8 0
3 years ago
Read 2 more answers
The area of a rectangle is 54 ft?, and the length of the rectangle is 3 ft more than twice the width. Find the dimensions of the
nikklg [1K]

Answer:

prim

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Choose the correct description of the graph of the compound inequality:
    9·1 answer
  • The sum of the measures of the angles of all triangles is 180 degrees. If one angle of the triangle measure 45 degrees. The meas
    13·2 answers
  • Find the decimal equivalent to 4/15
    11·1 answer
  • How to turn 0.07 with the repeating bar on the 7 into a fraction?
    15·1 answer
  • Assume a random variable x is normally distributed with mean = 90 and standard deviation = 5. Find the indicated probability.
    14·1 answer
  • Pleaseee helppp ASAPP
    6·2 answers
  • The equation below describes a circle. x^2+14x+y^2=70. what are the center and radius of the circle?
    11·1 answer
  • -2x + 15 = 7 <br> Show your work steps and the solution
    11·2 answers
  • When the stress on a rock in the mantle is greater than the rock is strong ________.
    8·2 answers
  • Help me fast pleas- <br><br> help meeeeeeeeeeeeee
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!