Question

Calcule:
a) log1=
8

b)5 log7=
5

c)2+ log5 =
2 2

Answer 1

a) log1=8

x^(8)=1
x=1

b) 5log7=5
log7^(5)=5

x^(5)=7^(5)
x=7

c) 2+log5=22
log5=22-2
log5=20
x^(20)=5

x=5^(1/20)