Practice problem
What is i−i3+i5−i7+⋯+i97−i99i-i^3+i^5-i^7+ \cdots + i^{97}-i^{99}i−i3+i5−i7+⋯+i97−i99?
000
50i50i50i
49i49i49i
99i99i99i
Type a concept, like “slope” or “photosynthesis”.