# Is complex

Are these numbers 2i, 4i, 2i + 1, 8i, 2i + 3, 4 + 7i, 8i, 8i + 4, 5i, 6i, 3i complex?

Result

Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

#### To solve this example are needed these knowledge from mathematics:

Try our complex numbers calculator.

## Next similar examples:

1. De Moivre's formula
There are two distinct complex numbers z such that z3 is equal to 1 and z is not equal 1. Calculate the sum of these two numbers.
2. Imaginary numbers
Find two imaginary numbers whose sum is a real number. How are the two imaginary numbers related? What is its sum?
3. Complex number coordinates
Which coordinates show the location of -2+3i
4. Im>0?
Is -10i a positive number?
5. Linear imaginary equation
Given that ? "this is z star" Find the value of the complex number z.
6. Reciprocal
Calculate reciprocal of z=0.8-1.8i:
7. Log
Calculate value of expression log |3 +7i +5i2| .
8. ABS CN
Calculate the absolute value of complex number -15-29i.
9. Roots
Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ?
10. Theorem prove
We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
11. Calculation of CN
Calculate: ?
12. Equation
Equation ? has one root x1 = 8. Determine the coefficient b and the second root x2.
13. Discriminant
Determine the discriminant of the equation: ?
14. Sequence 3
Write the first 5 members of an arithmetic sequence: a4=-35, a11=-105.
15. Linsys2
Solve two equations with two unknowns: 400x+120y=147.2 350x+200y=144
16. Geometric progression 2
There is geometric sequence with a1=5.7 and quotient q=-2.5. Calculate a17.
17. AS sequence
In an arithmetic sequence is given the difference d = -3 and a71 = 455. a) Determine the value of a62 b) Determine the sum of 71 members.