Question

Se log 2 = 0,3 calcule o valor da expressao log 160+ log 40 - log 20

Answer 1

Resposta:

Explicação passo a passo:

log 10 = 1

log 160 + log 40 - log 20=

log 16.10+ log 4.10 - log 2.10=

log 2^4.10+ log 2^2.10 - log2.10=

(4.log2 +log 10) + (2.log2 +log10) -(log2 +log10)=

(4.0,3+1)+(2.0,3+1)-(0,3+1)=

(1,2+1)+(0,6+1)-(1,3)=

2,2+1,6-1,3=

3,8-1,3=

2,5