Practice problem
Find the value of kkk, given that the quotient 2−kik−i\frac{2-ki}{k-i}k−i2−ki is a purely imaginary number.
k=0k = 0k=0
k=±1k = \pm1k=±1
k=±2k = \pm \sqrt{2}k=±2
None of the above
Type a concept, like “slope” or “photosynthesis”.