`\sqrt{4-2x} = 3`
ĐKXĐ : `x \le 2`
`↔ 4 -2x = 9`
`↔ 2x = 4 - 9 = -5`
`↔ x= -5/2` ( TMĐK )
Vậy `S = {-5/2}`
Đáp án + Giải thích các bước giải:
$\sqrt{4-2x}=3$ DK:$x<=2$
$⇒4-2x =9$
$⇔2x =-5$
$⇔x = \frac{-5}{2}$(TM)
Vậy $S={\frac{-5}{2}}$
Mk xin hay nhất ạ
Viết calli chữ Giang tradi hay digi đều đc ưu tiên tradi có màu NL: cho hỏi ảnh dưới viết theo kiểu calli thì đúng ko?
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Đề bài : Hai số tự nhiên có tổng bằng 2011 và giữa chúng có 9 số chẵn Tìm 2 số đó.
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giải cho mềnh đc khum ạ .Mềnh đg cần gấp
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chỉ cho mik cách lm dàn ý trong 1 câu chuyện tiếng anh nhớ cho ví dụ nha.
Một trong số những thứ quý giá nhất mà cuộc đời đã ban tặng cho ta, đó chính là sức khỏe. Em hãy viết một đoạn văn nghị luận khoảng 2/3 trang giấy thi về tầm quan trọng của sức khỏe đối với mỗi con người. - CHÚ Ý: VIẾT ĐOẠN VĂN NGHỊ LUẬN KHOẢNG 2/3 TRANG GIẤY THI
(-3)--2/9 13.2/3.4/9-4.4/9-4/9.2/3 (3/4+0,25):3/5+2/3+(-2020)
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