JAMB - Mathematics (1993 - No. 8)
Solve without using tables log5(62.5) - log5(\(\frac{1}{2}\))
3
4
5
8
説明
log5(62.5) - log5(\(\frac{1}{2}\))
= log5\(\frac{(62.5)}{\frac{1}{2}}\) - log5(2 x 62.5)
= log5(125)
= log553 - 3log55
= 3
= log5\(\frac{(62.5)}{\frac{1}{2}}\) - log5(2 x 62.5)
= log5(125)
= log553 - 3log55
= 3