1. lim x→10 lgx/x²=lg10/100=1/100
2. lim x→∞ (4x-3)=∞
3. lim x→∞(3x+1)/(6x+5)=lim x→∞ (3+1/x)/(6+5/x)=3/6=1/2
4.( x²-x)/(1-x)=x(x-1)/(1-x)=-x lim x→1 (-x)=-1
5. (1+2/x)³ˣ=[(1+2/x)^x/2]⁶ так как x/2*b=3x b=3x*2/x=6
limx→∞[(1+2/x)^x/2]⁶=e⁶
<span> x-4(9-x)=3x+2
х-36+4х=3х+2
х+4х-3х=2+36
2х=38
х=38:2
<u>х=19</u></span>
=1.8у-2.8у-2у-0.2х+3=-3у-0.2х+3
Cos 45=√2/2
sin15=(sin45-sin30)=cos30sin45-cos45sin30=√3/2*1/√2-1/√2*1/2=√3-1/2√2
(√3-1)*√2/2√2*2= √3-1/4