Practice problem
Find the sum 100−99+98−97+95−94⋯+2−1100-99 + 98 - 97 + 95 - 94 \cdots + 2 - 1100−99+98−97+95−94⋯+2−1.
000
505050
100100100
500050005000
505050505050
Type a concept, like “slope” or “photosynthesis”.
