Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Mathematics Complex Numbers Imaginary Number i and its properties

Evaluate \(\rm \left[i^{18}+\left(\frac{1}{i}\right)^{25}\right]^3\).

1
2(1 - i)
2
7(i - 1)
3
2 - 7i
4
8i + 4
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