(1/4)^(x^2 + 3) <= 4^2
4^( - x^2 - 3) <= 2
- x^2 - 3 <= 2
- x^2 - 5 <= 0
x^2 + 5 >= 0
x ∈ ( - ∞; + ∞)
<span>100=10^2
10=10^1;
1=10^0;
0,1=10^-1;
0,01=10^-2;
0,001=10^-3;
0,0001=10^-4;
0,00001=10^-5;
0,000001=10^-6;</span>
(6,9*5)*(10^-2 * 10^-3)=34,5*10^-5=3,45*10^-4=0,000345
Метан ..............................