Mechanical Engineering Exam  >  Mechanical Engineering Questions  >  a)z2 = 1 b)z3 = 1 c)z4 = 1 d)z9 = 1Correc... Start Learning for Free

  • a)
    z2 = 1      

  • b)
    z3 = 1  

  • c)
    z4 = 1      

  • d)
    z9 = 1 

Correct answer is option 'C'. Can you explain this answer?
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a)z2 = 1 b)z3 = 1 c)z4 = 1 d)z9 = 1Correct answer is option 'C'. C...
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a)z2 = 1 b)z3 = 1 c)z4 = 1 d)z9 = 1Correct answer is option 'C'. C...
Explanation:

To solve this question, we need to substitute z3 with z and then check which of the given options satisfy the equation.

Let's go through each option and substitute z3 with z:

a) z2 = 1:
Substituting z3 with z, we get (z)2 = 1.
By simplifying, we have z2 = 1.
This is a quadratic equation, and it does not match the given equation.
Hence, option 'a' is not the correct answer.

b) z3 = 1:
Substituting z3 with z, we get (z)3 = 1.
By simplifying, we have z3 = 1, which is the given equation.
Therefore, option 'b' is a possible solution.

c) z4 = 1:
Substituting z3 with z, we get (z)4 = 1.
By simplifying, we have z4 = 1.
This equation does not match the given equation z3 = 1.
Hence, option 'c' is not the correct answer.

d) z9 = 1:
Substituting z3 with z, we get (z)9 = 1.
By simplifying, we have z9 = 1.
This equation does not match the given equation z3 = 1.
Hence, option 'd' is not the correct answer.

Therefore, the correct answer is option 'b' as it satisfies the given equation z3 = 1.
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a)z2 = 1 b)z3 = 1 c)z4 = 1 d)z9 = 1Correct answer is option 'C'. Can you explain this answer?
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