Question

Jika log 2 = 0,3010 , log 3 = 0,4771 , log 5 = 0,6990 dan log 7 = 0,8451.Maka tentukan nilai dari log 6 , log 21 , log 25 , log 15 , log 42 , log 70 ,dan log 84 ?

Answer 1

Log6=log2.3=log2+log3=0,3010+0,4771=0,7781
log21=log7.3=log7+log3=0,8451+0,4771=1,3222
log25=log5.5=log5+log5=0,6990+0,6990=1,3980
log15=log5.3=log5+log3=0,6990+0,4771=1,1761
log42=log2.3.7=log2+log3+log7=0,3010+0,4771+0,8451=1,6232
log70=log2.5.7=log2+log5+log7=0,3010+0,6990+0,8451=1,8451
log84=log2.2.3.7=log2+log2+log3+log7=0,3010+0,3010+0,4771+0,8451=1,9242