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  • Find the multiplicative inverse of the following. (i) - 13               (ii) -13/19          (iii) 1/5         (iv) -5/8*-3/7         (v) -1*-2/5        (vi)  - 1

4. Find the multiplicative inverse of the following.

    (i)  - 13               (ii) \frac{-13}{19}           (iii) \frac{1}{5}            (iv) \frac{-5}{8}\times \frac{-3}{7}          (v)  -1\times \frac{-2}{5}         (vi)  - 1

Answers (1)

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(i) The multiplicative inverse of -13 is \frac{-1}{13} because  -13\times \frac{-1}{13} = 1

(ii) The multiplicative inverse of \frac{-13}{19} is \frac{-19}{13} because of i

(iii) The multiplicative inverse of \frac{1}{5}  is 5 because   \frac{1}{5}\times 5 = 1

(iv) The multiplicative inverse of \frac{-5}{8}\times \frac{-3}{7} is  \frac{56}{15}  because  \frac{15}{56}\times \frac{56}{15} = 1

(v) The multiplicative inverse of -1\times \frac{-2}{5} is  \frac{5}{2} because   \frac{2}{5}\times \frac{5}{2} = 1

(vi) The multiplicative inverse of -1 is -1 because -1\times -1 = 1

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Divya Prakash Singh

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