Đáp án: A= (3√x/√x+2) Tìm GTNN của A ( Đkxđ x ≥ 0 , x ≠ 4 ) - Đáp án Min = 0 Giải thích các bước giải (l)A = ((3√ x )/(√ x + 2)) = ((3( (√ x + 2) ) - 6)/(√ x + 2)) = 3 - (6/(√ x + 2))Do√ x ≥ 0∀ x ≥ 0 → √ x + 2 ≥ 2 → (6/(√ x + 2)) ≤ 3 → - (6/(√ x + 2)) ≥ - 3 → 3 - (6/(√ x + 2)) ≥ 0 → Min = 0 ⇔ x = 0

Đáp án Min = 0 Giải thích các bước giải (l)A = ((3√ x )/(√ x + 2)) = ((3( (√ x + 2) ) - 6)/(√ x + 2)) = 3 - (6/(√ x + 2))Do√ x ≥ 0∀ x ≥ 0 → √ x + 2 ≥ 2 → (6/(√ x + 2)) ≤ 3 → - (6/(√ x + 2)) ≥ - 3 → 3 - (6/(√ x + 2)) ≥ 0 → Min = 0 ⇔ x = 0

hackpat01

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A= $\frac{3√x}{√x+2}$ Tìm GTNN của A ( Đkxđ: x ≥ 0 , x $\neq$ 4 )

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Đặng Phương

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Đáp án:

$Min = 0$

Giải thích các bước giải:

$\begin{array}{l}
A = \dfrac{{3\sqrt x }}{{\sqrt x + 2}} = \dfrac{{3\left( {\sqrt x + 2} \right) - 6}}{{\sqrt x + 2}}\\
= 3 - \dfrac{6}{{\sqrt x + 2}}\\
Do:\sqrt x \ge 0\forall x \ge 0\\
\to \sqrt x + 2 \ge 2\\
\to \dfrac{6}{{\sqrt x + 2}} \le 3\\
\to - \dfrac{6}{{\sqrt x + 2}} \ge - 3\\
\to 3 - \dfrac{6}{{\sqrt x + 2}} \ge 0\\
\to Min = 0\\
\Leftrightarrow x = 0
\end{array}$

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A= $\frac{3√x}{√x+2}$ Tìm GTNN của A ( Đkxđ: x ≥ 0 , x $\neq$ 4 )

1 câu trả lời

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việt nam dành độc lập vào năm nào

Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

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I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.