<span>{4(х-2)-3(у+3)=1
{3(х+2)-2(х-у)=5</span>
{4x - 8 - 3y - 9 = 1
{3x + 6 - 2x + 2y = 5
{4x - 3y = 18
{x + 2y = -1
{4x - 3y = 18
{x = -1 - 2y
{-4 - 8y - 3y = 18
{x = -1 - 2y
{-11y = 22
{x = -1 - 2y
{y = -2
{x = -1 -2y
{y = -2
{x = 3
b3=b1*q^2 b6=b1*q^5 b6/b3=b1q^5/b1q^2=q^3=-192/-3=64 q^3=64=4^3 => q=4
b3=b1*q^2=b1*16 -3=16b1 b1=-3/16
D=49+72=121
x1=-7+11\2=2
x2=-7-11\2=-9
1)cos 7230 градусов = cos 30 = корень из 2 /2
<span>2)sin 900 градусов = sin 180 = 0
следовательно </span>cos7230+sin900=cos 30+sin 180=
+ 0 =<span>
Как-то так вроде...
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