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25 May, 18:36

Z^5=-7776i

Find the solution of the following equation whose argument is strictly between 270 and 360 degrees

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Answers (1)
  1. 25 May, 19:04
    0
    Z=+6

    Step-by-step explanation:

    Z^5=-7776i

    Let's note that i I mathematics means negative one i. e

    i = - 1

    So the equation is equal to

    Z^5=- * - (7776)

    Z^5 = 7776

    Z = 5√7776

    Since it's a divisible by 6

    It's giving us a clue that 6 it's the answer.

    Ok let's check the 5th root of 7776 in our calculator.

    Z=+6

    +6 is the solution to the equation

    Z^5=-7776i
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