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quiz (1) Diff

Total questions: 10

Worksheet time: 7mins

Name
Class
Date
1.

write your name

4 lines
2.

If x2+4y24xy=0x^2+4y^2-4xy=0 , then dxdy=\frac{\text{d}x}{\text{d}y}= …………

a)

-1

b)

12\frac{1}{2}

c)

2

d)

1

3.

The rate of change of x+1x1\frac{x+1}{x-1} with respect to x+1\sqrt[]{x+1} at x=3x=3 equal ........

a)

-2

b)

14\frac{1}{4}

c)

1

d)

2

4.

The derivative of y=2cos2(x)cot(x)y=2\cos^2\left(x\right)-\cot\left(x\right) with respect to z=sin(x) z=\sin\left(x\right)\ equal

a)

2 tan (x)+csc2(x)2\ \tan\ \left(x\right)+\csc^2\left(x\right)

b)

4sin(x)+sec(x)csc2(x)-4\sin\left(x\right)+\sec\left(x\right)\csc^2\left(x\right)

c)

4tan (x)+csc2(x)4\tan\ \left(x\right)+\csc^2\left(x\right)

d)

2tan(x)+sin(x)-2\tan\left(x\right)+\sin\left(x\right)

5.

if f(x)=sin2(tanx),then f (π4)=f\left(x\right)=\sin^2\left(\tan x\right),then\ f^{\ '}\left(\frac{\pi}{4}\right)=

a)

zero

b)

2

c)

2 sin (2)

d)

sin (4)

6.

If x=(y51)8x=\left(y^5-1\right)^8 , then dydx=\frac{\text{d}y}{\text{d}x}=

a)

y5140 x y\frac{y^5-1}{40\ x\ y}

b)

8 (y51)78\ \left(y^5-1\right)^7

c)

40 x y40\ x\ y

d)

zero

7.

The slope of the curve : y=x+sec(x)y=\sqrt[]{x+\sec\left(x\right)} at x=0x=0 equal ........

a)

-1

b)

zero

c)

12\frac{1}{2}

d)

1

8.

If y+cot(x)=0y+\cot\left(x\right)=0 , then dydx=\frac{\text{d}y}{\text{d}x}=

a)

1+y1+y

b)

1+y21+y^2

c)

y21y^2-1

d)

y2y^2

9.

If f(x)=sin(x) sec (2x) f\left(x\right)=\sin\left(x\right)\ \sec\ \left(2x\right)\ , then f (0)=f^{\ '}\left(0\right)=

a)

-1

b)

zero

c)

1

d)

2

10.

If y=14sec4(x) y=\frac{1}{4}\sec^4\left(x\right)\ , then dydx=\frac{\text{d}y}{\text{d}x}=

a)

4y tan(x)4y\ \tan\left(x\right)

b)

4y4y

c)

sec3(x) tan(x)\sec^3\left(x\right)\ \tan\left(x\right)

d)

y tan(x)y\ \tan\left(x\right)