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Question

Find multiplicative inverse of the following:a) 72 b) 53
[2 marks]

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Solution

The multiplicative inverse of a number N isrepresented by 1N or N1. It is also called as reciprocal of a number.We can use law of exponent also.am = 1am [1 mark]a)The multiplicative inverse of 72 will be72 = 172 [0.5 mark]b)The multiplicative inverse of 53 will be53 = 153 [0.5 mark]

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Additive inverse of a rational number
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