Đáp án: Căn bậc 2 x+1=x Giải giùm em - Đáp án x=(1+√(5)/2) Giải thích các bước giải ĐK x≥0 √(x+1)=x ⇔x+1=x^2 ⇔x^2-x-1=0 ⇔(x^2-x+1/4)-5/4=0 ⇔(x-1/2)^2=5/4 ⇔x-1/2=(±√(5)/2) ⇔x=(1±√(5)/2) Đối chiếu ĐK< ta được x=(1+√(5)/2)

Đáp án x=(1+√(5)/2) Giải thích các bước giải ĐK x≥0 √(x+1)=x ⇔x+1=x^2 ⇔x^2-x-1=0 ⇔(x^2-x+1/4)-5/4=0 ⇔(x-1/2)^2=5/4 ⇔x-1/2=(±√(5)/2) ⇔x=(1±√(5)/2) Đối chiếu ĐK< ta được x=(1+√(5)/2)

Trần Gia Huy

2 năm trước

Căn bậc 2 x+1=x Giải giùm em

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inamoriryder9326

2 năm trước

Đáp án: `x=\frac{1+\sqrt{5}}{2}`

Giải thích các bước giải:

ĐK: $x≥0$

$\sqrt{x+1}=x$

$⇔x+1=x^2$

$⇔x^2-x-1=0$

`⇔(x^2-x+1/4)-5/4=0`

`⇔(x-1/2)^2=5/4`

`⇔x-1/2=\frac{±\sqrt{5}}{2}`

`⇔x=\frac{1±\sqrt{5}}{2}`

Đối chiếu ĐK< ta được: `x=\frac{1+\sqrt{5}}{2}`

thuhue05102003

2 năm trước

Đáp án:

Giải thích các bước giải: ĐK : x ≥0

PT tương đương : x+1=x^2

→ x^2 -x -1=0

→ x=( 1+ √5) ÷2 hoặc x= (1- √5 ) ÷2

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Choose the best answer.
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Căn bậc 2 x+1=x Giải giùm em

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Nước ta có bao nhiêu dân tộc?

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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.

Đề thi - đề kiểm tra Xem thêm

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.