<span>1) f(x)=sinx-cosx </span>
<span><span>f'(x)=(sinx)' - (cosx)' = cosx - (-sinx) = cosx + sinx </span></span>
<span><span><span>2) f(x)=tgx-4ctgx</span></span></span>
<span>3) f(x)=4x-sinx </span>
<span>f'(x)=(4x)' - (sinx)' = 4 - cosx</span>
<span> <span>4) f(x)=6cosx-1,2x</span></span>
<span><span><span>f'(x)=(6cosx)' - (1,2x)' = -6sinx-1.2</span></span></span>
У=ln х-1/х+1
y'=1/x+1/(x+1)^2=(x^2+3x+1)/x(x+1)
y'=1/x+1/x^2=x^2+x=(1+x)/x^2
<span>y'=(2*sqrt(x^2+1)-2x(2x)*(1/2)/sqrt(x^2+1))/(x^2+1)=sqrt(x^2+1)/(x^2+1)^2</span>
(1/6 + 1 1/10) * 24 = (5/30 + 1 3/30) * 24 = 1 8/30 * 24 = 1 4/15 * 24 = 19/15 * 24 = (19 * 24)/15 = (19 * 8)/5 = 152/5 = 304/10 = 30,4
Ответ: 30,4.