Question

the value of (7^-1 - 8^-1)^-1 -(3^-1 - 4^-1)^-1​

Answer 1

Answer:

0 is the answer

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Answer 2

Answer:

${( {7}^{ - 1} - {8}^{ - 1}) }^{ - 1} - {( {3}^{ - 1} - {4}^{ - 1}) }^{ - 1} \\ = { (\frac{ 1}{7} - \frac{1}{8} )}^{ - 1} - {( \frac{1}{3} - \frac{1}{4}) }^{ - 1} \\ = {( \frac{8 - 7}{56} )}^{ - 1} - {( \frac{4 - 3}{12}) }^{ - 1} \\ = {( \frac{1}{56} )}^{ - 1} - {( \frac{1}{12}) }^{ - 1} \\ = 56 - 12 \\ = 44$

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