1. any number in the form of a+- bi, where a and b are real numbers and b is not equal to 0, is considered a pure imaginary number (true/false)

2. i^2=square root -1 (true/false)
3. complex numbers can be graphed on the xy coordinates plane (true/false)

Question

1. any number in the form of a+- bi, where a and b are real numbers and b is not equal to 0, is considered a pure imaginary number (true/false)

2. i^2=square root -1 (true/false) 
3. complex numbers can be graphed on the xy coordinates plane (true/false)

anonymous · Answer

1. false  (need a=0 for pure)
2.false ( i = sqrt(-1) so i^2 = -1  )

anonymous · Answer

as for  3 -> we graph complex number in the plane where one axis are real and one axis are imaginary
so it is false in essence

anonymous · Answer

okay thank you very much :)