Решите........................

Question

Решите........................

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Answer 1

1
log(1/3)(x+2)=-4
x+2=81
x=79
2
lg²x=lgx+1
lg²x-lgx-1=0
lgx=a
a2-a-1=0
D=1+4=5
a1=(1-√5)/2⇒lgx=(1-√5)/2⇒
a2=(1+√5)/2⇒lgx=(1+√5)/2⇒
3
log(1/2)(5-log(3)x)=-2
5-log(3)x=4
log(3)x=1
x=3