How do you find #abs( -7i )#?
1 Answer
Jan 9, 2018
# |-7i | = 7 #
Explanation:
Using the definition:
# |a+bi|=sqrt(a^2+b^2)#
Then:
# |-7i | = sqrt ( 0^2+(-7)^2) #
# \ \ \ \ \ \ \ \ \ \ = sqrt ( 49) #
# \ \ \ \ \ \ \ \ \ \ = 7 #
