Find the derivative of the function at P0 in the direction of u.f(x, y, z) = tan-1 
, P0(7, 0, 0), u = 12i - 3j + 4k
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.Let R ={(x, y): 1 ? x < 6, 0 ? y < 8}. Evaluate 
dA, where f is the function 
A. 315 B. 40 C. 291 D. 507
Mathematics
Simplify the expression.(1 + i)2 - (1 + i)
A. 1 - i. B. -1 - i. C. 1 + i. D. -1 + i. E. none of these
Mathematics
State the value of the discriminant and the number of real solutions.5x2 - 20 = 0
A. 400, one B. 400, two C. 0, one D. -400, two
Mathematics
Find a formula for the inverse of the function described below.32° Fahrenheit = 0° Celsius. A function that converts temperatures in Celsius to those in Fahrenheit is 
.
A. f-1(x) = x + 32
B. f-1(x) = 
x + 32
C. f-1(x) = 
(x + 32)
D. f-1(x) = 
(x - 32)
Mathematics