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Sedaia [141]
4 years ago
7

Any number in the form of a ± bi , where a and b are real numbers and b 0 is considered a pure imaginary number.

Mathematics
2 answers:
klasskru [66]4 years ago
8 0
The standard form of an imaginary number is <span>a ± bi where a is the real number and b is the imaginary number. The answer hence is false. i related to an imaginary number is equal to square root of -1. Hence when i is squared, the answer should be -1. Answer is false. Complex numbers can be graphed only in an plane with an imaginary axis and a real axis/ Answer in 3 is false</span>
Stella [2.4K]4 years ago
7 0
Answer.
1) False
2) False
3) False

Explanation
1) When a number is written as a+bi, a and b are real number. b is never considered as imaginary number.
The statement given is false.


2) The value of i is √(-1), when squared we get;

(√(-1))² = -1.
The answer given is false.

3) It is not possible to graph a complex number is XY coordinates. Complex number are graphed on an imaginary axis and real axis only. 
The statement given is false. 


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Using an exponential function, it is found that the number 131.5 represents the initial value of the plane, in thousands of dollars.

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A decaying exponential function is modeled by:

A(t) = A(0)(1 - r)^t

In which:

  • A(0) is the initial value.
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In this problem, the function for the value of the airplane after t years is given by:

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Hence A(0) = 131.5, which means that the number 131.5 represents the initial value of the plane, in thousands of dollars.

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The only decimal value between 0.67 and 0.78 is 0.75, corresponding to the fraction 3/4.

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