Đáp án: sqrt(x+1)=2 Giúp mình với - Đáp án √( x + 1 ) = 2 ( x >= 1 ) <=> x + 1 = 4 <=> x = 3 (t/m) Vay x = 3 Giải thích các bước giải

Đáp án √( x + 1 ) = 2 ( x >= 1 ) <=> x + 1 = 4 <=> x = 3 (t/m) Vay x = 3 Giải thích các bước giải

Đáp án + Giải thích các bước giải √(x+1) = 2 đk x>=-1 <=> (√(x+1))^2= 2^2 <=>x+1=4 <=> x=3(tm) Vậy x=3

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`sqrt{x+1}=2` Giúp mình với....

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trandohuonggiang

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Đáp án:

`\sqrt{ x + 1 } = 2 ` ` ( x >= 1 ) `

`<=> x + 1 = 4 `

`<=> x = 3 ` $(t/m)$

Vay ` x = 3 `.

Giải thích các bước giải:

Abaddon

3 tháng trước

Đáp án + Giải thích các bước giải:

`\sqrt{x+1} = 2`

`đk : x>=-1`

`<=> (\sqrt{x+1})^2= 2^2`

`<=>x+1=4`

`<=> x=3(tm)`

Vậy `x=3`

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