Question
16, 9, ?, 114.25, 750.625,
6396.3125Solution
16 × 0.5 + 1 = 9 9 × 2.5 + 2 = 24.5 24.5 × 4.5 + 4 = 114.25 114.25 × 6.5 + 8 = 750.625 750.625 × 8.5 + 16 = 6396.3125
Find the reciprocal of the complex number z = 9 – 4i.
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