OpenStudy (anonymous):

I -3i I=?

6 years ago
jimthompson5910 (jim_thompson5910):

Hint: |a+bi| = sqrt(a^2+b^2)

6 years ago
jimthompson5910 (jim_thompson5910):

In your case, a = 0 and b = -3 since -3i is the same as 0-3i

6 years ago
OpenStudy (jamesj):

Draw this complex number out on the complex plane. How long is the line segment from the 'origin' (0+0i) to -3i ?

6 years ago
OpenStudy (anonymous):

3i

6 years ago
OpenStudy (jamesj):

length is always a real number

6 years ago
jimthompson5910 (jim_thompson5910):

The absolute value of any complex number is always a real number.

6 years ago
OpenStudy (anonymous):

3

6 years ago
jimthompson5910 (jim_thompson5910):

good, you got it

6 years ago