1. jika log 3 = 0,4777 dan log5 = 0,699 . maka log45 adalah?.... Question from @aisyahsitinor

September 2018 2 62 Report

1. jika log 3 = 0,4777 dan log5 = 0,699 . maka log45 adalah?

mimmie Log 45 = log (3^2 x 5)
= 2 x log 3 + log 5
= 2 x 0,4777 + 0,699
= 1,6544

kiranya membantu..
mimmie

0 votes Thanks 0

IcukSugiarto $\bold{\underline{Solution:}}\\\\ log\ 45\\=log\ (9 \times 5)\\=log\ 9 + log\ 5\\=log\ 3^{2} + log\ 5\\=2\ log\ 3 +log\ 5\\=2(0,477)+0,699\\=0,954+0,699\\=1,653$

$=====================================\\\bold{Note:}\\Remember\ this\ formula:\\\boxed{~^{a}log\ b + ~^{a}log\ c = ~^{a}log\ (b \times c)}\\\boxed{~^{a}log\ b^{m}=m~^{a}log\ b}$

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Bentuk sederhana dari 2akar 20 + akar 28-3 akar 125=4 akar 63-5 akar 80 adalah

1. jika log 3 = 0,4777 dan log5 = 0,699 . maka log45 adalah?

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