Advertisements
Advertisements
प्रश्न
By what number should 5−1 be multiplied so that the product may be equal to (−7)−1?
Advertisements
उत्तर
Using the property a−1 = 1/a for every natural number a, we have 5−1 = 1/5 and (−7)−1 = −1/7. We have to find a number x such that \[\frac{1}{5} \times x = \frac{- 1}{7}\] Multiplying both sides by 5, we get:
Hence, the required number is −5/7.
APPEARS IN
संबंधित प्रश्न
Evaluate.
`{(1/3)^(-1) - (1/4)^(-1)}^(-1)`
Find the value of the following:
\[\left\{ \left( \frac{1}{3} \right)^{- 1} - \left( \frac{1}{4} \right)^{- 1} \right\}^{- 1}\]
Find the value of the following:
Simplify:
Evaluate:
(−3)−2
Simplify:
\[\left( 4^{- 1} - 5^{- 1} \right) \div 3^{- 1}\]
Simplify:
By what number should 5−1 be multiplied so that the product may be equal to (−7)−1?
Which of the following numbers is not equal to \[\frac{- 8}{27}?\]
(a) \[\left( \frac{2}{3} \right)^{- 3}\]
(b) \[- \left( \frac{2}{3} \right)^3\]
(c) \[\left( - \frac{2}{3} \right)^3\]
(d) \[\left( \frac{- 2}{3} \right) \times \left( \frac{- 2}{3} \right) \times \left( \frac{- 2}{3} \right)\]
The multiplicative inverse of 1010 is ______.
