Question 36

Jambmaths question: 

Evaluate $\frac{{{5}^{-3}}\times {{5}^{-4}}}{{{5}^{-6}}\times {{5}^{-2}}}$

Option A: 

5

Option B: 

25

Option C: 

–7

Option D: 

–8

Jamb Maths Solution: 

$\frac{{{5}^{-3}}\times {{5}^{-4}}}{{{5}^{-6}}\times {{5}^{-2}}}=\frac{{{5}^{-3-4}}}{{{5}^{-6-2}}}=\frac{{{5}^{-7}}}{{{5}^{-8}}}={{5}^{-7-(-8)}}={{5}^{1}}=5$

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