230

231

232

233

${\mathrm{n}}^2$

${\mathrm{n}}^2 +1$

$\mathrm{n}(\mathrm{n}+1)$

$\mathrm{n}(\mathrm{n}-1)$

7

6

5

4

16

4

-16

-4

(1, 2)

(-1, 2)

(1, -2)

(-1, -2)

$\frac{12}{13}$

$\frac{13}{15}$

$\frac{13}{12}$

$\frac{12}{15}$

t

1

${\mathrm{t}}^2$

$\frac{1}{\mathrm{t}}$

$\mathrm{In}(1+{\mathrm{c}}^2)+\mathrm{c}$

$\mathrm{In} {\mathrm{e}}^2+\mathrm{c}$

$-\mathrm{In}(1+{\mathrm{c}}^2) +\mathrm{c}$

$-\mathrm{In}(1+{\mathrm{c}}^{-4}) +\mathrm{c}$

$\frac{1}{\sqrt{3}}$

$\sqrt{3}$

$\propto$

0

$\frac{{\mathrm{u}}^2 {\sin }^2 \mathrm{\alpha }}{2\mathrm{g}}$

$\frac{{\mathrm{u}}^2 {\sin }^2 \mathrm{\alpha }}{\mathrm{g}}$

$\frac{\mathrm{u} {\sin }^2 \mathrm{\alpha }}{2\mathrm{g}}$

$\frac{\mathrm{u} {\sin }^2 \mathrm{\alpha }}{-2\mathrm{g}}$

p-q = 1

p+q = 1

p+2q = 1

p=q-1

7x-3y-11 = 0

3x+7y-11 = 0

7x+3y-11 = 0

7x-3y-2 = 0

${\mathrm{x}}^2+{\mathrm{y}}^2+4\mathrm{x}+14\mathrm{y}=0$

${\mathrm{x}}^2+{\mathrm{y}}^2+4\mathrm{x}-14\mathrm{y}=0$

${\mathrm{x}}^2+{\mathrm{y}}^2-4\mathrm{x}+14\mathrm{y}=0$

${\mathrm{x}}^2+{\mathrm{y}}^2-4\mathrm{x}-14\mathrm{y}=0$

$\frac{\mathrm{\pi }}{4}$

$\frac{\mathrm{\pi }}{2}$

$\frac{3\mathrm{\pi }}{2}$

$\mathrm{\pi }$

3:1:2

$\sqrt{3}:1:2$

$3:1:\sqrt{2}$

$2:1:3$

(100011)

(100111)

(101101)

(111001)