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Find the multiplicative inverse of (-2+4i) ?
-1/10 -2i/10
1/10 -2i/10
-2 -4i
None of these
Multiplicative inverse of (-2+4i) is
= 1/(-2+4i) × (-2-4i)/(-2-4i)
= ( -2-4i) /20
= -2/20 - 4i/20
= -1/10 – 2i/10
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