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kykrilka [37]
3 years ago
9

MCQ type questions.

Mathematics
2 answers:
Tatiana [17]3 years ago
7 0

Answer: Option one i.

Explanation:

Just rewrite √-1 as i.

Sever21 [200]3 years ago
5 0
I believe the answer would be option one i.

explanation:

simplify
√1i

simplify √1 to 1
1 x i

simplify
i
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Given the digits 2,5,7,9, 4, and 1, how many 4-digit codes can be made if 4 points
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Answer:

144

Step-by-step explanation:

first digit of the code: only 2 and 4 are the only even numbers availible, so only 2 possibilities for the first digit.

2nd digit of code: 2,5,7,9,1 so 6 possibilities for the 2nd digit.

3rd digit of code: 2,5,7,9,1 so 6 possibilities for the 3rd digit.

4th digit of code: only 7 and 9 are greater tyhan 6 so only 2 possibilities for the 4th digit.

SO...

2 x 6 x 6 x 2 = 144

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