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21-06-2021
Mathematics

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What complex number is represented by the expression 7i5 + 9i8?

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sqdancefan sqdancefan

22-06-2021

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Answer:

9 +7i

Step-by-step explanation:

i^2 = -1, so i^8 = (-1)^4 = 1, and i^5 = (-1)^2×i = i

Then ...

7i^5 +9i^8 = 7i +9 = 9 +7i

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