объяс:
(9-x)×(6x-1)×(x-7)≥0
{(9-x)×(6x-1)≥0
{x-7≥0
{x∈ [1/6;9]
{x≥7
{x∈[7,9]
{x∈ (-∞;1/6]∪{9;+∞)
{x∈ (-∞;1/6]∪[7;9]
отв:
x∈(-∞;1/6]∪[7;9]
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Answers & Comments
объяс:
(9-x)×(6x-1)×(x-7)≥0
{(9-x)×(6x-1)≥0
{x-7≥0
{x∈ [1/6;9]
{x≥7
{x∈[7,9]
{x∈ (-∞;1/6]∪{9;+∞)
{x∈ (-∞;1/6]∪[7;9]
отв:
x∈(-∞;1/6]∪[7;9]