Find the derivative of the function at P0 in the direction of u.f(x, y, z) = ln(x2 + 3y2 + 9z2), P0(3, 3, 3), u = 3i + 4j
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find an equation for the line tangent to the curve at the point defined by the given value of t.x = t + cos t, y = 2 - sin t, t = 
A. y = -
x - 
? + 2
B. y = -
x + 
C. y = 
x - 
?
D. y = -
x + 
? + 3
Mathematics
Solve the problem.Let f(x) = 5(4z - 1)-1 and g(x) = 2(4z - 1)-2. Find all x such that f(x) + g(x) = -2.
A. - 
, 
B. -2, - 
C. - 
, - 
D. - 
, 0
Mathematics
Write the decimal in words.5.704
A. five and seventy thousand four hundredths B. five and seven hundred four thousandths C. five and seventy-four thousandths D. five and seventy tenths and four thousandths
Mathematics
Expand.
3
A. 
x3 + 
x2 + 25x + 125
B. 
x3 + 
x2 + 25x + 125
C. 
x3 + 
x2 + 125
D. 
x6 + 
x3 + 125
Mathematics