A standup comedian uses algebra in some jokes including one

A stand-up comedian uses algebra in some jokes, including one about a telephone recording that announces \"You have just reached an imaginary number. Please multiply by i and dial again.\" Explain the joke.

Solution

In joke , we have

\"You have just reached an imaginary number. Please multiply by i and dial again.\"

It means that if we multiply \'i\' in an imganiry number , we should get positive number between 0 and 9

We would get only positive integer if we have dialled earlier a negative imaginary value

i*0i=0

i*-i=-i^2 =1

i*-2i=-2i^2=2

i*-3i=-3i^2=3

i*-4i=-4i^2=4

i*-5i=-5i^2=5

i*-6i=-6i^2=6

i*-7i=-7i^2=7

i*-8i=-8i^2=8

i*-9i=-9i^2=9