KVPY Government Jobs Exams

Suppose n is a natural number such that| i + 2i2 + 3i3 + ... + nin |=18 2 , where i is the square root of – 1.
Then n is

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KVPY Other Question

Suppose logab + logba = c. The smallest possible integer value of c for all a, b > 1 is Let P be an m × m matrix such that P2 = P. Then (1 + P^)n equals