### জাহাঙ্গীরনগর বিশ্ববিদ্যালয়

#### B2-ইউনিট

##### 1. Recently DEMU Train has been introduced in Bangladesh. The abbreviation of DEMU is.

Diverse Electronics Multi-sector Unit

Diesel Electrical s Multiple Unite

Digital Electronics Modeling Unite

Diesel Electrical Modeling Unite

##### 2. If X is above Y and Z , and Y is above Z and below W. Which one of the following statement is correct ?

W is above Z

Z is above Y

Z is above W

X is not above Z & W

##### 3. Maximum height of a thrown object--

$2u/g$

${u}^{2}/g$

$2{u}^{2/g}$

##### 4. Two Ordered Pairs (a,b) and (c,d) will be equal, if and only if.

a=c& b+d

$a\cong c&b=d$

##### 5.

${f}^{-1}\left(-3\right)=3$

${f}^{-1}\left(-3\right)=0$

${f}^{-1\left(-3\right)=}\varnothing$

a+c>b+c

ac>bc,if c>0

ac

all of three

1

-1

none

##### 8.

x

-2x

2x

${\mathrm{x}}^{2}$

##### 9.

$±2$

$±\sqrt{2}$

$±\sqrt{2\mathrm{i}}$

$1$

##### 10.

1

$1/\sqrt{2}$

$1}{2}$

2

##### 11. Which one of the following is not true?

$\mathrm{cos}2\mathrm{T}=2{\mathrm{cos}}^{2}\mathrm{T}-1$

$\mathrm{cos}2\mathrm{T}=1+2{\mathrm{sin}}^{2}\mathrm{T}$

##### 12. Two forces of magnitude 3m and 2m respectively have a resultant R. if the first force is doubled, the magnitude of the resultant is doubled.Find the angle betuween forces?

90$°$

120$°$

135$°$

145$°$

(2,3)

(3,2)

18,-6

(6,-2)

##### 14. Which one of the following is not wrong?

$\frac{d}{dx}\left(\mathrm{sin}x\right)+-\mathrm{cos}x$

$\frac{d}{dx}\left(\mathrm{co}tx\right)=\mathrm{cos}ecx$

$\frac{d}{dx}\left(\mathrm{tan}x\right)=secx$

##### 15. Determine the equation of the directer of parabola:${x}^{2+8x+2y=0}$

2y=5/13

y=17/2

$y=1}{2}$

y=2/5

3/2

1

2/3

1/2

25

40

54

90

20

5

10

15

U

Q

W

Z

Melancholy

Mourning

None

##### 21. Shelly is taller than Polly. Dolly is taller than Keya. Keva is shorter than Shirin. Polly and Shirin are of the same height. Hf the above is true, which of the followmy statement must also be truce.

Dolly is taller than Shirin

Dolly is taller than Shelly

Polly is shorter than Dolly

Shelly is taller than Keya

100

80

60

50

##### 23. The angles of a triangle are in the ratio 2:3:4. The largest angle in the triangle is

40$°$

70$°$

75$°$

80$°$

N+P

NP

NP+2

N+P+1

4

16

46

8

4

5

8

10

##### 27. Which of the following expresses the perimeter of a square region in terms of its area K?

4k

$\sqrt[2]{k}$

$\sqrt{2k}$

$\sqrt[4]{k}$

7/8

8/9

11/13

17/18

x=4

x=o

x<4

x>4

##### 30. The sum of the 3 consecutive numbers i 123. the product of two smaller numbers is What?

625

1600

1640

1680

RightAns: 0 | WrongAns: 0 | Result: 0/0