D. -i / -i
ExplanationStep 1: Powers of i repeat after every 4 powers. Step 2: i⁷ = i⁴×i³ = 1×(-i) = -i. Step 3: Remember i²=-1 and i³=-i.
Step 1: i की powers हर 4 पर repeat होती हैं। Step 2: i⁷ = i⁴×i³ = 1×(-i) = -i। Step 3: i²=-1 और i³=-i याद रखें।
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