Предмет: Алгебра, автор: fullhouse8

найдите наименьшее значение x при котором имеет смысл выражение 19-(4-5x) и все это под корнем

Ответы

Автор ответа: PopCop312

$<var>\sqrt{19-(4-5x)}</var>$

19-(4-5x)≥0

5x≥-15

x≥-3

Автор ответа: 16artemiy16

19-(4-5x)=19-4+5x=15+5x (всё под корнем)

15+5х ≥ 0 (т.к. если будет отр. число под корнем, то не получится)

5х ≥ -15

х ≥ -3

Ответ. -3.

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