(2^6)^x²-3x+20)<(2^-3)^2x²-6x-200
2^6x²-18x+120<2^-6x²+18x+600
6x²-18x+120<-6x²+18x+600
6x²-18x+120+6x²-18x-600<0
12x²-36x-480<0
x²-3x-40<0
x1+x2=3 U x1*x2=-40⇒x1=-5 U x2=8
+ _ +
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-5 8
x∈(-5;8)
<span>0/3^x=1000/27</span>
<span>0.09x=1000/27</span>
<span>x=1000/27/0.09</span>
<span>x=1000/300</span>
<span>x=3.3</span>
3(x+1)=-12
3x-3=-12 3x+3=-12
3x=-12+3 3x=-12-3
3x=-9 3x=-15
x=-9/3 x=-5
x=-3
3¹⁸*7¹⁸/21¹⁹=21¹⁸/21¹⁹=21¹⁸⁻¹⁹=21⁻¹=1/21