12*8*6=576 см3 - обьем паралелепипеда
8*8*8=512 см3 - обьем куба
576/512=1.125 (112%)
512/576=0.88 (88%)
3^(2x-1)=3^(3x^2-3)
3x^2-3=2x-1
x^2-2/3x=2/3
(x-1/3)^2=7/9
x1=1/3*(1-sqrt(7))
x2=1/3*(1+sqrt(7))
<span>y=(arcsinx)^(1/x)=e^(ln(arcsin(x))/x</span>)
y`=e^(ln(arcsin(x))/x) * (ln(arcsin(x))/x)` = <span>
= (arcsinx)^(1/x)</span> * [ (ln(arcsin(x))` * x - (ln(arcsin(x)) * x` ] / x^2 =
= (arcsinx)^(1/x) * [ (x*(arcsin(x))`/arcsin(x) - (ln(arcsin(x)) ] / x^2 =
= (arcsinx)^(1/x) * [ (x/корень(1-x^2) *1/arcsin(x) - (ln(arcsin(x)) ] / x^2
<span>y=ln(x+(sqrtx^2+4))
y`=1/</span><span>(x+(sqrtx^2+4)) * </span><span>(x+(sqrtx^2+4))` = </span>
=1/(x+(sqrtx^2+4)) * <span>(1+1/2*1/корень(x^2+4)*</span><span><span>(x^2+4)'</span>) = </span>
=1/(x+(sqrtx^2+4)) * (1+1/2*1/корень(x^2+4)*2х) =
=1/(x+(sqrtx^2+4)) * (1+х/корень(x^2+4)) =
=1/(x+(sqrtx^2+4)) * (корень(x^2+4)+х)/корень(x^2+4) =
=1/корень(x^2+4)
Объем = 20*20*20=8000см³
1л=1000см³
8000:1000=8л
A)х=-3.5
б) р=3/5
с) х=7.2+9
х=16.3
d) m=12/8
e) k= 1.3
f) m= 81/12