Question

Help!

Answer 1

`a+bi `can you tell me which term is an imaginary and which one is real part ?
do you know the definitions ?

Answer 2

3 is a real number and 719 is pure imaginary.

Answer 3

that's correct and what would be the complex number ?

Answer 4

btw you should say `719i` is pure imaginary number

Answer 5

that's correct and what would be the complex number ?

Answer 6

Alright, 3 seems to be a complex number.

Answer 7

complex is a sum of both real+imaginary numbers

Answer 8

\[\rm a+bi\] where `a` is real number
`bi` is pure imaginary ( imaginary part b)
and the sum of both is complex \[\rm \color{Red}{a}+\color{blue}{bi} \]

Answer 9

assuming a,b ≠ 0

Answer 10

Alright, the number has both real and complex parts.

Answer 11

`real+imaginary =complex`
the combination of real and imaginary number is complex number

Answer 12

oh i see select all that apply
hmm
they are asking about `3-719i` which is what number ?

Answer 13

complex

Answer 14

correct

Answer 15

What type of number would it be if a was imaginary and bi was a real number? @Nnesha

Answer 16

would it still be complex?

Answer 17

`bi` is not real number
do you see the `i` that makes it imaginary number
where just b is real
but together bi is an imaginary

Answer 18

a can't be imaginary if it's `ai` then you can say ai is imaginary

Answer 19

b are**

Answer 20

a+bi where a and b are integers

Answer 21

Alright, I understand now. The next question was just arranged differently from this one. It would still be complex.

Answer 22

yes just remember if its just a number then it's real
and if it is with `i` then that would be imaginary part
here are some examples \[\rm 3i +4\] complex number where `3i` is an imaginary part and 4 is real

Answer 23

or fractions \[\rm \frac{ 4i+6 }{ 5 } can~be~written~as~\frac{ 4i }{ 5 } +\frac{6}{5}\]
where 4i/5 is imaginary part and 6/5 is real

Answer 24

Alright, let's see...
For example: -240.1 <--- real parts.

Answer 25

There's no \[i\]

Answer 26

correct if there is no i then there is no imaginary part

Answer 27

oh my gosh, it just said incorrect.

Answer 28

Khan**

Answer 29

what ??

Answer 30

Khan labeled 'real' as incorrect. Its supposed to be real and complex :/

Answer 31

Never mind, I passed the topic :)

Answer 32

i see that's where we should use the fact provided by uncle;
if a=0 then it would be imaginary and complex
and if b=0 then it would be real and complex

Answer 33

so for \[ -240.1 \] is same as \[\rm 0i-240.1\]

Answer 34

that what makes it real AND complex

Answer 35

one more example \[\rm 4i\] is this real complex or imaginary ?

Answer 36

Should be imaginary.

Answer 37

what if the statement says check all that apply ?

Answer 38

It would be: real complex.
4 is a real number and \[i\] is a imaginary that would equal a complex number.

Answer 39

no 4i is an imaginary part where just 4 is real number but that would make 4i real
4i is same as 0+4i where 0 is real part and 4i is an imaginary part so
0+4i=4i which is complex AND an imaginary

Answer 40

would NOT**

Answer 41

if given is 3 options and we have to pick 2 then you should pick complex and imaginary
and if you just pick one then just imaginary part

Answer 42

more examples
`real,imaginary,complex ?`
\[\rm 3i+2\]
pick two`real,imaginary, complex`
\[5\]
pick two`real,imaginary, complex`

\[6.6i\]

Answer 43

1. complex
2. real and complex.
3. imaginary complex.

Answer 44

perfect

Answer 45

5 is same as 5+0i and 6.6i is same as 0+6.6i

Answer 46

is
0 + 0i

real,
imaginary,
complex, or
none of the above?

Answer 47

real complex