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प्रश्न
By what number should (−4)−1 be multiplied so that the product becomes 10−1?
विकल्प
`2/3`
`(-2)/5`
`5/2`
`(-5)/2`
उत्तर
`(-2)/5`
Explanation;
Hint:
(−4)−1 = `(-1/4)^1`
= `(-1)/4`
10−1 = `(1/10)^1`
= `1/10`
`(-1)/4 xx x = 1/10`
x = `(-4)/10`
= `(-2)/5`
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