2) <span> 2) log5 х = 4 ОДЗ</span><span>: х> 0
</span> log5 х = 4⇒x=5⁴=625
4) log3(x+2)=3 ОДЗ: x+2>0⇒x>-2
log3(x+2)=3⇒x+2=3³⇒x=27-2=25
6)log0,2(3-x)=2 ОДЗ: 3-x>0⇒x<3
<span>log0,2(3-x)=2</span>⇒3-x=0,2²⇒x=3-0.04=2.96
1) 56.483.972.572
2)103.067.025
3)39.008.016.000
(a+3b)(a+b+2)-(a+b)(a+3b+2)=a2+4ab+2a+3b2+6b-a2-4ab-2a-3b2-2b=4b
log3x+4iog9x=9;4logx/log9+logx/log3=9;logx=log27; 3log/log3=9;(4log3+log9)logx/log3log9=9;log27/x=0