Question

Diketahui log 2=0,3010 ; log3=0,4771 ; log 7 =0,8451 tentukan :
a.log 18
b .log 21
c.log 10,5
d.log 1/7

Answer 1

diketahui log 2 = 0.03010 log 3 = 0.4771 dan log 7 = 0.8451
tent
log 18 = log (3² x 2)
= 2log3 + 2log2
= 2 x 0.4771 + 0.3010
= 1.2552

log 21 = log (7 x 3)
=log 7 + log3
=0.8451 + 0.4771
=1.3222

log 10.5 =log 7 x 3 per 2
log 7 + log 3 - log 2
= 0.8451 + 0.47771 - 0.3010
=
tolong jadikan jawaban terbaik yaaa