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| 1. |
Find the value of following expression: i30 + i80 + i120 |
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Answer» i30 + i80 + i120 = i(28 + 2) + i80 + i120 = (i4)7 × i2 + (i4)20 + (i4)30 = – 1 + 1 + 1 = 1 [since i4 = 1, i2 = – 1] i30 + i80 + i120 = 1 |
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