Question

Sederhanakanlah:


²log5+²log4 - ²log10

Answer 1

^2log5 + ^2log4 - ^2log10
= ^2log(5x4:10)
= ^2log2
= 1

Answer 2

^2log5 + ^2log4 - ^2log10
 
Penyelesaian:
= ^2log5 + ^2log4 - ^2log10
= (^2log5 + ^2log4) - ^2log10
= (^2log (5 x 4)) - ^2log10     --> apabila penjumlahan (+) maka perkalian (x)
= (^2log (20)) - ^2log10
= ^2log (20) - ^2log10
= ^2log (20 / 10)                   --> apabila pengurangan (-) maka pembagian (/)
= ^2log 2
= 1