Sосн=36
Проведём высоту FO
По т. Пифагора
(6х6)+(6х6)=корень из 72=6 корень из 2
АО=3 корень из 2
По т. Пифагора
FO=36-18=18
V= 12x18= 216 сантиметров кубических
A) y=4x*e^2x
y' = 4*(x*e^2x)' =
4*( x' * e^2x + x*(e^2x)' ) =
4*( 1 * e^2x + x*(e^2x)*(2x)' ) =
4*( e^2x + x*(e^2x)*2 ) =
4 * e^2x + x*(e^2x)*8 =
4 * e^2x + 8 * x * e^2x
Б) y=ln (tg^2 (x/6))
y' = 1/tg^2 (x/6) * (tg^2 (x/6))' =
1/tg^2 (x/6) * 2*(tg^(2-1) (x/6)) * (tg (x/6))' =
1/tg^2 (x/6) * 2*(tg^1 (x/6)) * (tg (x/6))' =
1/tg^2 (x/6) * 2*(tg (x/6)) * (1/cos^2 (x/6)) * (x/6)' =
1/tg (x/6) * 2 * (1/cos^2 (x/6)) * (x/6)' =
1/tg (x/6) * 2 * (1/(cos^2 (x/6)) ) * (1/6) =
(2/6) * 1/tg (x/6) * (1/(cos^2 (x/6)) )=
(1/3) * 1/tg (x/6) * (1/(cos^2 (x/6)) )=
(1/3) * (cos (x/6)/sin (x/6)) * (1/(cos^2 (x/6)) )=
(1/3) * (1/sin (x/6)) * (1/(cos (x/6)) )=
(1/3) * (1/( (sin (x/6)) * (cos (x/6)) ) )=
(1/3) * ( 1/( (1/2)*sin(2x/6) ) ) =
(1/3) * (2/(sin(2x/6) ) ) =
(1/3) * (2/(sin(x/3) ) ) =
(2/3) * (1/(sin(x/3) ) ) =
2 / (3*sin(x/3))
5кв.см., 5 кв.дм., 5кв.м., 555кв.дм., 555000кв.см.
9кв.м +18кв.м 5кв.дм=27м² 5 дм², 15кв.м 38 кв.дм.+ 47 дм²=15м²85дм², 8 кв.м 5кв.дм+58кв.дм=8 м² 63 дм², 23кв.м+570 кв.дм.=28 м² 70 дм².