If the function is one-to-one, find its inverse. If not, write "not one-to-one."f(x) = -
, x ? 5
A. f-1(x) = 
, x ? 5
B. f-1(x) = 
, x ? 0
C. f-1(x) = -
, x ? 0
D. f-1(x) = 
, x ? 0
Answer: B
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 
for r(t) = 2sec2(t)i - 4tan(t)j + 7t2k
A. v
= -8j - 
?k
B. v
= -8j + 
?k
C. v
= 8i - 8j + 
?k
D. v
= 8i + 8j - 
?k
Mathematics
Identify the type of surface represented by the given equation.
+ 
= 
A. Ellipsoid B. Hyperbolic paraboloid C. Paraboloid D. Elliptical cone
Mathematics
Simplify, if possible, by combining like terms.2st2 - 9st2
A. -7st2 B. 7st2 C. -7s2t4 D. Cannot be simplified
Mathematics
Multiply.-19i ? 3i
A. -57i B. 57 C. -57 D. 57i
Mathematics