If r2=(x-a)2+(y-b)2 then rxx+ryy=

1.  1/r

2.  1/r2

3.  r2

4.  r

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4
Correct Answer :

1/r


Explanation :
No Explanation available for this question

If u=log(x3+y3+z3-3xyz) then

1.  19/(x+y+z)3

2.  -9/(x-y-z)2

3.  -9/(x+y+z)2

4.  9/(x+y+z)2

View Answer  
4
Correct Answer :

-9/(x+y+z)2


Explanation :
No Explanation available for this question

If u=3(lx+my+nz)2-(x2+y2+z2) and l2+m2+n2=1 then uxx+uyy+uzz=

1.  0

2.  u

3.  2u

4.  None

View Answer  
4
Correct Answer :

0


Explanation :
No Explanation available for this question

If a2x2+b2y2=c2z2 then

1.  1/z2

2.  1/c2z

3.  1/z

4.  1

View Answer  
4
Correct Answer :

1/c2z


Explanation :
No Explanation available for this question

If

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

If Z=1n(1+xr+yr) then Zxy=

1.  -Zx Zy

2.  Zx Zy

3.  Zx2

4.  Zy2

View Answer  
4
Correct Answer :

-Zx Zy


Explanation :
No Explanation available for this question

If,then uxy(0,0)=

1.  1

2.  0

3.  π/4

4.  π/2

View Answer  
4
Correct Answer :

1


Explanation :
No Explanation available for this question

If V is the volume of a variable cone with base radius r and vertical height h then Vrh=

1.  2πr/3

2.  2π/3

3.  2πh/3

4.  None

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4
Correct Answer :

2πr/3


Explanation :
No Explanation available for this question

If F=x2yz-2xz3+xz2 then at (1,0,-2) is

1.  0

2.  4

3.  -4

4.  None

View Answer  
4
Correct Answer :

-4


Explanation :
No Explanation available for this question

If u=x3-xy+y3 then

1.  0

2.  1

3.  -1

4.  2

View Answer  
4
Correct Answer :

0


Explanation :
No Explanation available for this question
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