Answers

2015-05-29T12:55:35+05:30
Additive inverse of 7=-7 (because 7+-7=0)
Multiplicative inverse of 7=1/7 (because 7*1/7=1)

Sum of multiplicative and additive inverse of 7:
(-7)+(1/7)
-49+1
    7
-48/7    <------- Answer
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2015-05-29T20:50:37+05:30
Additive inverse of 7 = -7
Multiplicative inverse of 7 = 1/7
sum of additive and multiplicative inverse of 7 = -7+1/7
                                                                     = -49+1/7 
                                                                     = -48/7.
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