X - x^3 = 2x - 5x^3
x - x^3 - 2x + 5x^3 = 0
4x^3 - x = 0
x(4x^2 - 1) = 0
x = 0 или 4x^2 -1 = 0
4x^2 = 1
x^2 = 1/4
x = + 1/2 или х = - 1/2
Ответ: {0, 1/2, -1/2}
=25^(5/4+(-5/12)-1/3)=25^(15/12 - 5/12 - 4/12) = 25^(6/12) = 25^(1/2) = √25 = 5
49:14=3,5
3,5*100=350
350:7*3=150
Oтвет:150л
1 - Б, 2 -В , 3 - А .
А- 3 , Б - 1 , В - 2 .
5log2 x>20
log2 x>4
log2 x > log 2 2^4
x>16