Log₅ 625 = log₅ 5 ⁴ = 4 log⁵5 = 4
log₆216 = log₆ 6³ = 3 log₆6 =3
2.2
(-2*1/4)³=(-0.5)³=-0.125
2.4
(3³-23)²=(27-23)²=4²=16
2.6
(1/2)³*2³=(1/8)*8=1
2.8
(-2/3)³*(3/2)²=(-8/27)*(9/4)=2/3
3.2
=<u></u>
=<u></u>
4.2
(xy)³=x³*y³
Решение
sin2x = cosx
2sinx*cosx - cosx = 0
cosx*(2sinx - 1 ) = 0
1) cosx = 0
x = π/2 + πk, k ∈ Z
2) 2sinx - 1 = 0
sinx = 1/2
x = (-1)^n* arcsin(1/2) + πn, n ∈ Z
x = (-1)^n* (π/6) + πn, n ∈ Z
вот держи решение и график