2log₂₀5 + log₂₀8 + (1/2)log₂₀4 = কত?

প্রশ্ন: 2log₂₀5 + log₂₀8 + (1/2)log₂₀4 = কত?

সমাধান:
2log₂₀5 + log₂₀8 + (1/2)log₂₀4
= log₂₀(5²) + log₂₀8 + log₂₀(2²)^1/2
= log₂₀25 + log₂₀8 + log₂₀2
= log₂₀(25 × 8 × 2)
= log₂₀400
= log₂₀20²
= 2log₂₀20
= 2