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Exponents and Powers — MATHS STD 7 — Question

ICSE BoardEnglish MediumSTD 7MATHSExponents and Powers1 Mark
MCQ
The value of $5^{-1}-6^{-1}$ is
  • A
    $\frac{1}{30}$
  • B
    $\frac{-1}{30}$
  • C
    30
  • D
    (-30)
✓

Answer

$\begin{array}{c}
5^{-1}-6^{-1}=\frac{1}{5}-\frac{1}{6} \\
=\frac{6-5}{30}=\frac{1}{30}
\end{array}$

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