1)607*619=375733. 2)607*608=369056 . 3)11*393=4323.4)375733-369056=6677. 5)6677+4323=11001
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<span>решите неравенство:
(23-5x)(</span>√<span>7-2.1)<0
</span>√7-2,1>0, т.к. √<span>7>2,1
</span>
(23-5x)(√7-2.1)<0 ⇔ (23-5x)<0 ⇔5x>23 x>23/5
----------------------------<span>23/5 //////////////////////////
</span>
x∈(23/4;∞)