ঢাকা বিশ্ববিদ্যালয়

  $\frac{n+1}{3(n+2)}$

  $\frac{n}{3(n+3)}$

  $\frac{n}{2(n+3)}$

  $\frac{n+2}{3(n+3)}$

  1

  5

  2

  3

  $(-\infty ,\frac{1}{2})$

  $(1,\infty )$

  $(-\infty ,\frac{1}{2})\cup (1,\infty )$

  $(-\infty ,\frac{1}{2}]\cup [1,\infty )$

  $\alpha \beta \theta$

  $\alpha \theta$

  $\beta \theta$

  $\alpha \beta$

  8

  -8

  $\sqrt{8}$

  $\pm 8$

  720

  2880

  180

  5040

  $\frac{8}{21}$

  $\frac{3}{7}$

  $\frac{10}{21}$

  $\frac{11}{21}$

  5/3

  5/2

  5

  2

  0,0

  $-2i,\frac{-\mathrm{\pi }}{2}$

  $2i,\frac{\mathrm{\pi }}{2}$

  -2,$\mathrm{\pi }$

  $\left(\begin{array}{c}-2\\ -2\end{array}\begin{array}{c}2\\ 2\end{array}\right)$

  $\left(\begin{array}{c}0\\ 0\end{array}\begin{array}{c}0\\ 0\end{array}\right)$

  $\left(\begin{array}{c}0\\ 3\end{array}\begin{array}{c}0\\ 0\end{array}\right)$

  $\left(\begin{array}{c}-2\\ 2\end{array}\begin{array}{c}-2\\ 2\end{array}\right)$

  5

  -5

  $\frac{1}{5}$

  $-\frac{1}{5}$

  $x^2+y^2-2x+6y+4=0$

  $x^2+y^2-2x+6y+1=0$

  $x^2+y^2-4x+6y+5=0$

  $2x^2+2y^2-2x+6y+3=0$

  (7,4)

  (4,7)

  (5,8)

  (8, 5)

  32 Sq. units

  16 Sq. units

  12 Sq. units

  24 Sq. units

  $\pm \frac{2}{3}$

  $\pm \frac{\sqrt{15}}{6}$

  $\pm \frac{7}{6}$

  $\pm \frac{\sqrt{23}}{6}$

  $\underset{AD}{\to }=\underset{AB}{\to }+\underset{BC}{\to }$

  $\underset{DA}{\to }=\underset{DF}{\to }+\underset{DE}{\to }$

  $\underset{AD}{\to }=\underset{AB}{\to }+\underset{AC}{\to }$

  $\underset{AD}{\to }=\underset{BE}{\to }+\underset{CF}{\to }$

  4a -6b=1

  4a- 6b = 2

  6a - 4b = 1

  6a - 4b = 2

  $2\cos 65°$

  $\sqrt{2}\cos 20°$

  $\sqrt{2}\sin 20°$

  $2\sin 20°$

  40x + 81 =0

  2x + 3 =0

  40 y + 81

  40 y + 41 =0

  $\frac{\mathrm{\pi }}{4}$

  $\frac{\mathrm{\pi }}{3}$

  $\frac{\mathrm{\pi }}{2}$

  $\frac{\mathrm{\pi }}{6}$

  ${\tan }^{-1}\frac{2}{11}$

  ${\sin }^{-1}\frac{11}{12}$

  ${\tan }^{-1}\frac{11}{2}$

  ${\cos }^{-1}\frac{11}{2}$

  $\frac{\mathrm{\pi }}{6}$

  $\frac{\mathrm{\pi }}{4}$

  $\frac{\mathrm{\pi }}{3}$

  $\frac{2\mathrm{\pi }}{3}$

  $x<-2,y>\frac{1}{2}$

  $-2<x<2,y\ge \frac{1}{2}$

  $-2\le x\le 2,y<\frac{1}{2}$

  $-x<-2\&x>,-2<y<2$

  y = x

  y = x + 1

  y =2 y +1

  y =2x

  $\frac{5}{6}$

  $\frac{1}{6}$

  $-\frac{1}{6}$

  $\frac{1}{3}$

  $60°$

  $90°$

  $120°$

  $150°$

  $\frac{3}{2}$

  $\frac{1}{2}$

  1

  $\frac{1n5}{xy}$

  $\frac{1n5}{-x^2}$

  $-\frac{y}{x}$

  $\frac{1n5}{y}$

  $\frac{1}{2}(1n2{)}^2$

  $\frac{1}{2}1n2$

  $\infty$

  $x{e}^x+c$

  $\tan \left(x{e}^x\right)+c$

  $cot\left(X{e}^x\right)+c$

  $\cos \left(X{e}^x\right)+c$