Free Printable รากที่ n ของจำนวนจริง 8-14

1.

$h=3+\sqrt{2}\ \ หาค่า\ \frac{h^2+1}{h-2}$

a)

$6\sqrt{2}$

b)

$-6\sqrt{2}$

c)

$3\sqrt{6}$

d)

$-3\sqrt{6}$

2.

$\sqrt{11x^2+45}=41\ \ หาค่า\ x$

a)

-3

b)

3

c)

5

d)

-5

3.

$\sqrt{3x+2}=3x\ \ หาค่า\ x$

a)

$-\frac{2}{3}$

b)

$\frac{1}{2}$

c)

$\frac{2}{3}$

d)

$-\frac{1}{2}$

4.

$\frac{13}{\left(\sqrt{3}+4\right)^2}$

a)

$-\frac{2+\sqrt{2}}{3}$

b)

$\frac{19-8\sqrt{3}}{13}$

c)

$\frac{2-\sqrt{3}}{13}$

d)

$-\frac{1}{2\sqrt{13}}$

5.

$\frac{3}{\left(\sqrt{2}+6\right)^2}+\frac{5}{\left(\sqrt{2}-6\right)^2}$

a)

$-\frac{2+\sqrt{2}}{3}$

b)

$\frac{19-8\sqrt{3}}{169}$

c)

$\frac{2-\sqrt{3}}{133}$

d)

$\frac{76+6\sqrt{2}}{289}$

6.

$\frac{3\sqrt{2}-6}{6+3\sqrt{2}}$

a)

$2\sqrt{2}-3$

b)

$19-8\sqrt{3}$

c)

$2-\sqrt{3}$

d)

$76+6\sqrt{2}$

7.

$\frac{\sqrt{48}-\sqrt{50}}{\sqrt{27}-\sqrt{8}}$

a)

$\frac{10-\sqrt{6}}{17}$

b)

$\frac{16-7\sqrt{6}}{19}$

c)

$\frac{\sqrt{3}}{2}$

d)

$76+6\sqrt{2}$

8.

$a=\frac{1}{\sqrt{2}}และ\ b=\frac{1+a}{1-a}\ \ \ \ จงหา\ b$

a)

$\frac{10-\sqrt{6}}{17}$

b)

$16-7\sqrt{6}$

c)

$3+2\sqrt{2}$

d)

$76+6\sqrt{2}$

9.

$a=\frac{1}{\sqrt{2}}และ\ b=\frac{1+a}{1-a}\ \ \ \ จงหา\ b-\frac{1}{b}$

a)

$4\sqrt{2}$

b)

$-7\sqrt{6}$

c)

$2\sqrt{2}$

d)

$76+6\sqrt{2}$

10.

$x\sqrt{7}=x\sqrt{2}+\sqrt{32}\ \ \ จงหา\ x$

a)

$4\sqrt{2}$

b)

$\frac{14+\sqrt{4}}{4}$

c)

$\frac{2\sqrt{2}-1}{5}$

d)

$\frac{8+4\sqrt{14}}{5}$

รากที่ n ของจำนวนจริง 8-14

Total questions: 10

Worksheet time: 10mins

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