1. 4(5-3х)+9х-7 = 20-12х+9х-7 = 13-3х
2. 7(2t+5)-23t-11 = 14t+35-23t-11 = 24-9t
3. -3(0.7p+1.4)+4.8-7.1p = -2.1p-4.2+4.8-7.1p = 0.6-9.2p
<span>y = log7(1-2x)
1-2x>0
-2x>-1
x<0,5
x</span>∈(-oo;0,5)
A) f`(x)=-sin(x-π/6)
б) f`(x)=-cos(π/4-x)
b)f`(x)=-1/(sin²(π/6+x))
г)f`(x)=1/cos²(x+π/3)
-10y+y=-18
X=-2y
-9y=-18
X=-4
y=2 (-4;2)