[tex] a)\left \{ {{ x^{2}+ y^{2} \leq 9 } \atop { x^{2}+ y^{2} } \geq 1,69} \right. b) \left \{ {{y \geq x^{2} } \atop {y \leq - x^{2} +9}} \right. [/tex]изоброзите на координатной плоскости решение системы неравенств
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