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Q: Is 4 a complex number

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-4=4ei*pi

No. Negative four is a real number. All real numbers are also complex numbers, so it is a complex number (but it's real, not nonreal)

The absolute value of a complex number is the magnitude of the number, which is found from sqrt(aÂ² + bÂ²) for the complex number a + bi

A complex number has a real part and a (purely) imaginary part, So imaginary numbers are a subset of complex numbers. But the converse is not true. A real number is also a member of the complex domain but it is not an imaginary number.

Yes. They are called surds. They are also complex.

Related questions

-4=4ei*pi

No. Negative four is a real number. All real numbers are also complex numbers, so it is a complex number (but it's real, not nonreal)

To divide by a complex number, write it as a fraction and then multiply the numerator and denominator by the complex conjugate of the denominator - this is formed by changing the sign of the imaginary bit of the number; when a complex number (a + bi) is multiplied by its complex conjugate the result is the real number a² + b² which can be divided into the complex number of the numerator: (-4 - 3i) ÷ (4 + i) = (-4 - 3i)/(4 + i) = ( (-4 - 3i)×(4 - i) ) / ( (4 + i)×(4 - i) ) = (-16 + 4i - 12i + 3i²) / (4² + 1²) = (-16 - 8i - 3) / (16 + 1) = (-19 - 8i)/17

The absolute value of a complex number a+bi is the square root of (a2+b2). For example, the absolute value of 4+9i is the square root of (42 + 92) which is the square root of 97 which is about 9.8489 (The absolute value of a complex number is not complex.)

The number -4 belongs to the set of all integers. It also belongs to the rationals, reals, complex numbers.

Adjoint operator of a complex number?

31

You get a complex number unless the real number happens to be 0 or 1.

The absolute value of a complex number is the magnitude of the number, which is found from sqrt(aÂ² + bÂ²) for the complex number a + bi

Yes. And since Real numbers are a subset of complex numbers, a complex number can also be a pure real.Another AnswerYes, for example: (0 + j5) is a complex number, whose 'real' number is zero.

The imaginary part of the complex number –5 + 3i is

No. A complex number is a number that has both a real part and an imaginary part. Technically, a pure imaginary number ... which has no real part ... is not a complex number.

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