Question

1) Encontre os valores dos logaritmos
a) Log7 49
b)Log6 216

4) Resolva a equaçao logaritmatica
Log5 (2x+3)=2

Answer 1

Boa tarde Nylo 

1) 

a) log7(49) = log7(7²) = 2log7(7) = 2*1 = 2
b) log6(216) = log(6³) = 3log6(6) = 3*1 = 3

4) 

log5(2x + 3) = 2
log5(2x + 3) = 2log5(5) = log5(25) 

2x + 3 = 25
2x = 22
x = 11