X/(x+6) <=0
___+____(-6)_____-_____[0]___+_____
Ответ: x e (-6; 0]
X^2-x+8x-8= x^2+7x-8
2а^2+a-8a-4= 2a^2-7a-4
mx+my-nx-ny
12m-30m^2-6+15m=27m-30m^2-6
<span>1) f`(x)=(5x³-4x²)`=15x²-8x
f`(2)=15·4-8·2=44
2) f`(x)=(2sinx+cosx-ctgx)`=2(sinx)`+(cosx)`-(ctgx)`=
= 2cox-sinx+(1/sin²x)
f`(π/6)=2·cos(π/6)-sin(π/6)+(1/sin²(π/6))=(2√3/2)- (1/2)+(1/(1/4))=√3-0,5+4=3,5+√3
3) f`(x)=(3(2x-1)⁵¹)`=3·(2x-1)⁵⁰·(2x-1)`=6·(2x-1)⁵⁰
f`(2)=6·(2·2-1)⁵⁰=6·3⁵⁰
4) f``(x)=(√(2x²+1))`=(1/2√(2х²+1))·(2х²+1)`=4x/2√(2х²+1)=2х/√(2х²+1)
f`(7)=14/√99
5) f`(x)=(sinx+cosx/sinx-cosx)`=(sinx+cox)`·(sinx-cosx)-(sinx+cosx)·(sinx-cosx)`/(sinx-cosx)²=
=(cosx-sinx)(sinx-cosx)-(sinx+cosx)(cosx+sinx)</span><span>/(sinx-cosx)²=
=-4(sin²x+cos²x)/</span><span>(sinx-cosx)²=-4/</span><span><span><span>(sinx-cosx)²</span>
f(</span>п/2)=-4/(1-0)²=-4
6) f`(x)=(4cos²2x)`=8cos2x·(cos2x)`=8cos2x·(-sin2x)·(2x)`=-8sin4x
f`(π/6)=-8sin(2π/3)=-8sin(π/3)=-4√3</span>
У-х+х-1=у-2х-1
у-х-(х-1)=у-х-х+1=у+1