Question

which of the following are complex numbers? 5. 3t or -1+2t

Answer 1

Complex numbers have Both a real part an imaginary part\[z=a+ib\]

Answer 2

okay so out of 5 3t or -1+2t is a complex #?

Answer 3

i dont know what you mean by t,

Answer 4

idk either its just in my question and idk what it means

Answer 5

i was using \(i\) to denote the imaginary unit \[i=\sqrt{-1}\]
perhaps \(t=i\)

Answer 6

no i don think thats it

Answer 7

In that case \[~5, ~3t, ~-1+2t \] do not have an imaginary component ,ie \(b=0\),
and they are all \(\in\mathbb R\) and not \(\in \mathbb C\)

Answer 8

actually im not sure

Answer 9

i think its 3t because it has a variable