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rodikova [14]
3 years ago
7

What’s the meaning of a boffin? Anyone?

SAT
1 answer:
Rus_ich [418]3 years ago
8 0

can u look at my last question i needa postttttttt

ALSO HI BAE

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Simplify: 1 + i + i^2 + i^3 +i^4 +i^5 if i^2 =-1.
Vika [28.1K]

1 + <em>i</em> + <em>i</em> ² + <em>i</em> ³ + <em>i</em> ⁴ + <em>i</em> ⁵ = 1 + <em>i</em> + <em>i</em> ² (1 + <em>i</em> + <em>i </em>² + <em>i</em> ³)

… = 1 + <em>i </em>+ <em>i</em> ² (1 + <em>i</em> + <em>i</em> ² (1 + <em>i</em> ))

… = 1 + <em>i</em> + (-1) (1 + <em>i</em> + (-1) (1 + <em>i</em> ))

… = 1 + <em>i</em> + (-1) (1 + <em>i</em> - 1 - <em>i</em> )

… = 1 + <em>i</em>

<em />

Alternatively, notice that

1 - <em>i</em> ⁶ = (1 - <em>i</em> ) (1 + <em>i</em> + <em>i</em> ² + <em>i</em> ³ + <em>i</em> ⁴ + <em>i</em> ⁵)

so that

1 + <em>i</em> + <em>i</em> ² + <em>i</em> ³ + <em>i</em> ⁴ + <em>i</em> ⁵ = (1 - <em>i</em> ⁶) / (1 - <em>i</em> )

Now, <em>i</em> ⁶ = (<em>i</em> ²)³ = (-1)³ = -1, so

1 + <em>i</em> + <em>i</em> ² + <em>i</em> ³ + <em>i</em> ⁴ + <em>i</em> ⁵ = (1 - (-1)) / (1 - <em>i</em> )

… = 2 / (1 - <em>i</em> )

Multiply the numerator and denominator by the conjugate of 1 - <em>i</em> :

… = 2 (1 + <em>i</em> ) / ((1 - <em>i</em> ) (1 + <em>i</em> ))

… = 2 (1 + <em>i</em> ) / (1² - <em>i</em> ²)

… = 2 (1 + <em>i</em> ) / (1 + 1)

… = 1 + <em>i</em>

3 0
2 years ago
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Freeeee brainly points!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
slamgirl [31]

Answer:

YESSS YESSSS FINALLY OMGGG

Explanation:

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3 years ago
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PSAT's MyRoad is a(n):
Sav [38]

Answer:

A

Explanation:

College and career planning

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which part of the emblem does the following describe? it signifies progress and holds a promise tomorrow will bring a new day, g
Paha777 [63]

The emblem which signifies progress and holds a promise tomorrow will bring a new day, glowing with opportunity is rising sun.

Given that the emblem signifies progress and holds a promise tomorrow will bring a new day, glowing with opportunity.

We are required to give the name of the emblem.

An emblem is basically an abstract or representational pictorial image that represents a concept, like a moral truth, or an allegory, or a person, like a king or saint.

The emblem which signifies progress and holds a promise tomorrow will bring a new day, glowing with opportunity is rising sun.

Hence the emblem which signifies progress and holds a promise tomorrow will bring a new day, glowing with opportunity is rising sun.

Learn more about promise at brainly.com/question/926522

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In which paragraph of the book review does the author provide the best
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What?????????? what book????
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