log5(√5 .3√5) এর মান কত?
সমাধান
সঠিক উত্তর: Option A
log5(√5 .3√5
= log5(51/2.51/3)
= log5{5{(1/2) + (1/3)}
= log5{5(3 + 2)/6}
= log555/6
= (5/6) log55
= (5/6) .1
= 5/6
= log5(51/2.51/3)
= log5{5{(1/2) + (1/3)}
= log5{5(3 + 2)/6}
= log555/6
= (5/6) log55
= (5/6) .1
= 5/6
