The answer is B, if you substitute x with 0 1 or 2 the result will always be 0
Answer:
3rd one is right answers so just put that only
Answer:
Therefore surface integral is
.
Step-by-step explanation:
Given function is,

To find,
where S=A=surfece of elliptic cylinder we have to apply Divergence theorem so that,





- If unit vector
directed in positive (outward) direction then z=c and,

- If unit vector
directed in negative (inward) direction then z=-c and,

Therefore surface integral without unit vector of the surface is,

Answer:
a + 8
Step-by-step explanation:
Note that
(x + y)² = x² + 2xy + y²
= x² + y² + 2xy
= a + 2(4) = a + 8
5(a - b) + 6(a + b) - 7(a - 2b) = 5a-5b+6a+6b-7a+14b= 4a + 15b