3< x<4

$\frac{1}{9}$>x>$\frac{1}{10}$

$\frac{1}{9}$>x>$\frac{1}{10}$ $\frac{1}{9}<x<\frac{1}{6}$

$\frac{1}{3}<x<\frac{1}{2}$

$\mathrm{\pi }$

$2\mathrm{\pi }$

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

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

$\frac{\mathrm{\pi }}{6},\frac{\mathrm{\pi }}{3}$

$\frac{\mathrm{\pi }}{4},\frac{\mathrm{\pi }}{3}$

$\frac{\mathrm{\pi }}{6},\frac{\mathrm{\pi }}{5}$

$\frac{\mathrm{\pi }}{6},\frac{\mathrm{\pi }}{4}$

4

3

2

0

০

10

11

100

1

-1

-4

-5

495

4223

-1760

1760

$\underset{a}{\to }.\underset{b}{\to }=0$

$\underset{a}{\to }\wedge \underset{b}{\to }=0$

$(\underset{a}{\to }+\underset{b}{\to }).(\underset{a}{\to }-\underset{b}{\to })=0$

$(\underset{a}{\to }+\underset{b}{\to }{)}^{\wedge }(\underset{a}{\to }-\underset{b}{\to })=0$

$(\frac{3\sqrt{3}}{2},\frac{3}{2})$

$(\frac{3\sqrt{3}}{2},\frac{3}{2})$

$(-\frac{3\sqrt{3}}{2},\frac{3}{2})$

$(-\frac{3\sqrt{3}}{2},\frac{3}{2})$

1

2$\sqrt{2}$

3

4

$x^2+y^2+8x -2y + 51 = 0$

${x}^2+y^2 -8x-2y+51=0$

$x^2+y^2 + 8x + 2y -51$

$x^2+y^2-8x-2y -51=0$

10

20

50

200

18

6

-9

9

$\frac{85}{36}$

$\frac{36}{85}$

$\frac{10}{9}$

$\frac{9}{10}$

2sin2x

0

1

cos2x

$-\infty <x\le 4;0\le y<\infty$

$-\infty <x<4;0<y<\infty$

$-\infty <x<4;0\le y<\infty$

$-\infty <x\le 4; 0 <y <\infty$

$\frac{7}{6}$

$-\frac{7}{6}$

1

-1

$60°$

$30°$

$90°$

$120°$

6: 5

5 : 6

11 : 1

1 : 6

(2,3)

(16,9)

(2,10)

(2,7)

1,0

$1, \frac{\mathrm{\pi }}{2}$

$1,\mathrm{\pi }$

$1,\frac{3\mathrm{\pi }}{2}$

$\sqrt{3}$

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

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

1

$\frac{1}{2}$

1

-1

$\frac{2}{3}uni{t}^2$

$-\frac{2}{3} uni{t}^2$

$\frac{3}{2}uni{t}^2$

$\frac{1}{3}uni{t}^2$

$\sqrt{73} N$

$\sqrt{97} N$

$\sqrt{55} N$

11 N

$\frac{1}{6} n (n+1)(2n+1)$

$\frac{1}{2}n (n+1)(n+2)$

$\frac{1}{6}n (n+1)(n+2)$

$\frac{1}{6}n (n +1) (n +2) (n +3)$

$\sin \left(x{e}^x\right)$

$\tan \left(x{e}^x\right)$

$cot\left(x{e}^x\right)$

$sec\left(x{e}^x\right)$

$\frac{1}{2}{f}^2\left(x\right)$

$\frac{1}{2}{x}^2$

$\frac{1}{2}\left[\right\{f(x{)}^2 -\{f\left(0\right){\}}^2]$

f(x) -f(0)

$\frac{25}{2}$

25

50

5