Question

дам 50 баллов. срочно!!!! не сложно!!!

Answer 1

ОДЗ x>0 и х≠1
log(x)an-log(x)a1=bn-b1
log(x)(an/a1)=bn-b1
an=a1*q^(n-1)⇒an/b1=q^(n-1)
bn=b1+d*(n-1)⇒bn-b1=d*(n-1)
log(x)27^(n-1)=3*(n-1)
(n-1)*log(x)27=3*(n-1)
log(x)27=3
x³=27
x=3