?Find the characteristic equation of the matrix .
?

A. ?
B. ?
C. ?
D. ?
E. ?

Answer: A

Mathematics

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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = -9 + 9 cos tFind the body's velocity at time t = ?/3 sec.

A.  m/sec
B. -  m/sec
C.  m/sec
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Find the values of x for which given series converges.

A. -10 ? x ? -8 B. -10 < x < -8 C. -9 < x < 9 D. 8 < x < 10

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Find the domain of the square root function. Then use the domain to choose the correct graph of the function.f(x) = 

A. domain of f: (-?, 3]

B. domain of f: [-3, ?)

C. domain of f: [3, ?)

D. domain of f: (-?, -3]

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