1) 9⁴ х 9⁻³ = 9⁴⁻³ = 9¹ = 9
2) 5⁻⁴ х 5³ = 5⁻⁴⁺³ = 5⁻¹ = 1/5 = 0,2
3) (1/2)⁻⁸ х (1/2)⁷ = (1/2)⁻¹ = 2
4) (1/3) х (1/3)¹° = (1/3)¹¹
5) 2⁴ : 2⁵ = 2⁻¹ = 1/2 = 0,5
6) 5 : 5⁻³ = 5¹⁻(⁻³) = 5¹⁺³ = 5⁴
<span>{3х=-6у
{x=-2y<span>
{2x-y-5=0
{2x-y-5=0
2(-2y)-y-5=0
-4y-y=5
-5y=5
y=-1</span><span>
x=2
вроде так! </span></span>
2*(1-sin^2 (πx/3))+5sin(πx/3)=4; -2sin^2(πx/3)+5sin(πx/3)-2=0
t=sin(πx/3); -2t+5t-2=0; D=25-4*(-2)*(-2)=9=3^2' t1=(-5-3)/(-4)=2;
t2=(-5+3)/(-4)=0,5
sin(πx/3)=0,5 ili sin(πx/3)=2
πx/3=(-1)^n (π/6)+πn решений нет
х=(-1)^n (π/6 * 3/π)+π*(3/π)*n
x=(-1)^n (0,5)+3n, n-celoe