1)
3-9х≥0
-9х≥-3
9х≤3
х≤3/9
х≤1/3
<span>2)</span>
5х+3<span>>0</span>
5х<span>>-3</span>
<span>x>-3</span>/5
х<span>>-0,6</span>
a₁ = 2,6 d = - 5,3 a₁₀ = ?
a₁₀ = a₁ + 9d = 2,6 + 9 * (- 5,3) = 2,6 - 50,4 = - 47,8