A
f`(x)=6x
f`(-2)=6*(-2)=-12
b
f`(x)=-2x
f`(2)=-2*2=-4
<u><span>ь (3a^2-3ab) ___</span></u><span> =<u>3а(а-в)___ </u> =<u> 3а (а-в)</u> =<u>а</u></span>
<span>/(3a^2-6ab+3b^2) 3(а ²-2ав+в²) 3 ( а-в)² а-в</span>
y*=e^(-x)+(-e^(-x))*x=e^(-x)-x*e^(-x)
log16 (1+cosπ/8)(1-cosπ/8)+2log16 cosπ/8= log16 (1-cos²π/8)+lod16 cos²π/8=
log16 (sin²π/8)+log16 cos²π/8= log(4²) (sin²π/8*cos²π/8=1/2log4 sin²π/8cos²π/8=
=log4 (sin²π/8cos²π/8)^1/2= log4(sinπ/8cosπ/8)=log4 (2sinπ/8cosπ/8)/2)=
=log4 (1/2sin π/4)=log4 1/2= 1/2*-1log2 2=-1/2
