D. -i / -i
ExplanationStep 1: In complex numbers i² = -1. Step 2: i³ = i²×i = -1×i = -i. Step 3: Powers of i repeat every 4 steps.
Step 1: Complex numbers में i² = -1 होता है। Step 2: i³ = i²×i = -1×i = -i। Step 3: powers of i हर 4 steps में repeat होती हैं।
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