# What is the mistake in the the following question?

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What is the mistake in the the following question?
posted Apr 18
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## 1 Answer

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The is repeated in the question

answer Apr 18

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The following is my attempt at proving that 1<-1 . In which of these steps did I first make a mistake?
Step 1: Let i = sqrt(-1) then i^2 = -1 and i^4=1.
Step 2: Hence, we have i^2 < i^4
Step 3: We divide both sides by i to get i < i^3.
Step 4: We divide both sides by i again to get 1<i^2 or 1 < -1

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What is the common mistake in both of the following images?