3 x < 6 \sqrt{3x}<6 3 x <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> < 6 Tất cả các giá trị của x thỏa mãn là

0 ≤ x < 12 0\le x<12 0 ≤ x < 1 2

0 ≤ x ≤ 12 0\le x\le12 0 ≤ x ≤ 1 2

0 < x ≤ 12 0<x\le12 0 < x ≤ 1 2

Cho A=5\ A = 5 và B = 2 6 B=2\sqrt{6} B = 2 6 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> Khẳng định nào sau đây đúng

A − B ≤ 0 A-B\le0 A − B ≤ 0

Độ dài đường cao của tam giác đều cạnh bằng a a là

a 3 2 \frac{a\sqrt{3}}{2} 2 a 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

a . 3 a.\sqrt{3} a . 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

a 2 a\sqrt{2} a 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

Cho tam giác MNP vuông tại M có MH là đường cao, NH=5cm, HP=9cm. Khi đó độ dài MH bằng

3 5 3\sqrt{5} 3 5 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> cm

On tap Toan 9 Tuan 1: Can bac hai va he thuc luong

Authored by Cai Long

Mathematics

8th - 9th Grade

Used 11+ times

On tap Toan 9 Tuan 1: Can bac hai va he thuc luong

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25 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

$-\sqrt{\left(-\frac{3}{5}\right)^2}=$ Giá trị của biểu thức

9/25

-3/5

3/5

-9/25

FILL IN THE BLANKS QUESTION

1 min • 1 pt

$\sqrt{x}=4$
Khi đó x=

(a)

MULTIPLE CHOICE QUESTION

1 min • 1 pt

$\sqrt{x}=2,5$
Khi đó x=

-5

6,25

-6,25

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Căn bậc hai số học của 0,01 là

0,001

0,0001

0,01

0,1

FILL IN THE BLANKS QUESTION

1 min • 1 pt

$\sqrt{49}+\sqrt{25}-4\sqrt{0,25}=$
(không dùng máy tính)

(a)

FILL IN THE BLANKS QUESTION

1 min • 1 pt

$\sqrt{10000}.\sqrt{\frac{1}{9}}.\sqrt{0,81}.\sqrt{0,09}=$

(a)

FILL IN THE BLANKS QUESTION

1 min • 1 pt

$\sqrt{16}-\sqrt{36}+\sqrt{64}=$

(a)

MULTIPLE CHOICE QUESTION

1 min • 1 pt

$\sqrt{3x}<6$
Tất cả các giá trị của x thỏa mãn là

$0<x<12$

$0\le x<12$

$0\le x\le12$

$0<x\le12$

FILL IN THE BLANKS QUESTION

1 min • 1 pt

$\sqrt{2x+1}=13$
Khi đó x=

(a)

10.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Cho $A=5\$ và $B=2\sqrt{6}$

Khẳng định nào sau đây đúng

A>B

A<B

A=B

$A-B\le0$

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On tap Toan 9 Tuan 1: Can bac hai va he thuc luong

−(−35)2=-\sqrt{\left(-\frac{3}{5}\right)^2}=−(−53​)2​= Giá trị của biểu thức

x=4\sqrt{x}=4x​=4 Khi đó x= (a)

x=2,5\sqrt{x}=2,5x​=2,5 Khi đó x=

Căn bậc hai số học của 0,01 là

49+25−40,25=\sqrt{49}+\sqrt{25}-4\sqrt{0,25}=49​+25​−40,25​= (không dùng máy tính) (a)

10000.19.0,81.0,09=\sqrt{10000}.\sqrt{\frac{1}{9}}.\sqrt{0,81}.\sqrt{0,09}=10000​.91​​.0,81​.0,09​= (a)

16−36+64=\sqrt{16}-\sqrt{36}+\sqrt{64}=16​−36​+64​= (a)

3x<6\sqrt{3x}<63x​<6 Tất cả các giá trị của x thỏa mãn là

2x+1=13\sqrt{2x+1}=132x+1​=13 Khi đó x= (a)

Cho A=5\A=5 và B=26B=2\sqrt{6}B=26​ Khẳng định nào sau đây đúng

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Discover more resources for Mathematics

$-\sqrt{\left(-\frac{3}{5}\right)^2}=$ Giá trị của biểu thức

$\sqrt{x}=4$
Khi đó x=

(a)

$\sqrt{x}=2,5$
Khi đó x=

$\sqrt{49}+\sqrt{25}-4\sqrt{0,25}=$
(không dùng máy tính)

(a)

$\sqrt{10000}.\sqrt{\frac{1}{9}}.\sqrt{0,81}.\sqrt{0,09}=$

(a)

$\sqrt{16}-\sqrt{36}+\sqrt{64}=$

(a)

$\sqrt{3x}<6$
Tất cả các giá trị của x thỏa mãn là

$\sqrt{2x+1}=13$
Khi đó x=

(a)

Cho $A=5\$ và $B=2\sqrt{6}$

Khẳng định nào sau đây đúng