Question

решите неравенство методом интервалов х*2-121≥0

Answer 1

x^2 -121>=0

(x-11)(x+11) >=0

 

    +                           -                           +

_________  -11______________11_______________

 

(- бескон; -11] объединённое [11;+ бесконечность)

Answer 2

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