Question

find the multiplicative inverse of 21/-3​

Answer 1

Answer:

the multiplicative inverse of 21/-3 is -3/21

Answer 2

$multiplicative \: inverse \: of \: \frac{21}{ - 3} \\ \\ = \frac{a}{b} \\ \\ a = 21 \: . \: \: b = - 3 \\ \\ = \frac{b}{a} \\ \\ = \frac{ - 1}{7}$

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