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Mkey [24]
3 years ago
8

I need help on these questions​

Mathematics
1 answer:
lilavasa [31]3 years ago
3 0

Answer:

9. m = -3

11. m = 1

13. m = \frac{3}{5}

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$i^5+i^{-25}+i^{45}$<img src="https://tex.z-dn.net/?f=%24i%5E5%2Bi%5E%7B-25%7D%2Bi%5E%7B45%7D%24" id="TexFormula1" title="$i^5+i
gregori [183]

i^5+i^{-25}+i^{45}

Rewrite the term i^{-25}

=i^5+\dfrac{1}{i^{25}}+i^{45}

Expand each term so we have

=i(i^2)^2+\dfrac{1}{i(i^2)^{12}}+i(i^2)^{22}

Use the fact that i^2=-1

=i(-1)^2+\dfrac{1}{i(-1)^{12}}+i(-1)^{22}

Use the fact that (-1)^{a}=1 when a is an even number

=i+\dfrac{1}{i}+i

Simplify

=i-i+i

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Let me know if you need any clarifications, thanks!

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3 years ago
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Step-by-step explanation:

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3 years ago
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Someone please help me on number 30. Thank you
timurjin [86]

8.9-3.3j=-2.2j+2.3
add 3.3j to both sides
8.9=1.1j+2.3
subtract 2.3 from both sides
6.6=1.1j
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7 0
3 years ago
What is the mean absolute deviation for 3 3 4 5 5 4
nikitadnepr [17]

Answer as a fraction = 2/3

Answer in decimal form = 0.667 (approximate)

=======================================================

Explanation:

The first thing we need is to find the mean. Add up the values to get 3+3+4+5+5+4 = 24. Then divide by n = 6 since there are 6 values.

24/n = 24/6 = 4

The mean is 4

Now subtract the mean from each value

  • 3-4 = -1
  • 3-4 = -1
  • 4-4 = 0
  • 5-4 = 1
  • 5-4 = 1
  • 4-4 = 0

Apply absolute value to each result so that the difference is not negative.

We get this new list: {1, 1, 0, 1, 1, 0}

Now compute the mean of that new list to get the final answer

1+1+0+1+1+0 = 4

4/n = 4/6 = 2/3 = 0.667 approximately

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3 years ago
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CAN ANYONE HELP ME ANSWER THIS ​
Step2247 [10]

I think is dependent

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3 years ago
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