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# Is the multiplicative inverse of? Why or why not?

Learn Exercise 1.1

Engineering graduate from NIT Calicut, Rank holder (#47) in State Entrance Examination.

-1 1/8=(-8+1)/8=-7/8 8/9*-7/8=-7/9 is not equal to 1. hence not the multiplicative inverse

8/9 is not the multiplicative inverse of -1 ? because multiplicative inverse of -1? = 8/-7.

Let rational number a/b of multiplicative inverse is c/d, Then we know a/b × c/d = 1 Thus × = 8/9 × -7/8 = -7/9 is not holds as additive inverse. Because it's not equal to 1.

Let rational number a/b of multiplicative inverse is c/d, Then we know

a/b × c/d = 1

Thus    ×

= 8/9 × -7/8

= -7/9  is not holds as additive inverse. Because it's not equal to 1.

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