Q23 of 196 Page 249

Out of the four options, only one is correct. Write the correct answer.

The value of (7–1 – 8–1)–1 – (3–1 – 4–1)–1 is

By laws of exponent,



∴ By using,






Again using,



= 56 – 12= 44


Hence, the value of (7–1 – 8–1)–1 – (3–1 – 4–1)–1 is 44.

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