# 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...):**

**Showing 0 comments:**

**Be the first to comment!**

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

## Next similar examples:

- De Moivre's formula

There are two distinct complex numbers z such that z^{3}is equal to 1 and z is not equal 1. Calculate the sum of these two numbers. - Imaginary numbers

Find two imaginary numbers whose sum is a real number. How are the two imaginary numbers related? What is its sum? - Complex number coordinates

Which coordinates show the location of -2+3i - Reciprocal

Calculate reciprocal of z=0.8+0.6i: - Linear imaginary equation

Given that ? "this is z star" Find the value of the complex number z. - Im>0?

Is 6i a positive number? - ABS CN

Calculate the absolute value of complex number -15-29i. - Roots

Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ? - Theorem prove

We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started? - Trinity

How many different triads can be selected from the group 38 students? - Fish tank

A fish tank at a pet store has 8 zebra fish. In how many different ways can George choose 2 zebra fish to buy? - Calculation of CN

Calculate: ? - The confectionery

The confectionery sold 5 kinds of ice cream. In how many ways can I buy 3 kinds if order of ice creams does not matter? - Calculation

How much is sum of square root of six and the square root of 225? - Discriminant

Determine the discriminant of the equation: ? - Linsys2

Solve two equations with two unknowns: 400x+120y=147.2 350x+200y=144 - Sequence 3

Write the first 5 members of an arithmetic sequence: a_{4}=-35, a_{11}=-105.