The graph of a function is given. Choose the answer that represents the graph of its derivative.

A.

B.

C.

D.


Answer: C

Mathematics

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Use the method of undetermined coefficients to solve the differential equation. + y = 9x + cos 2x;   = 0 and y = 9? when x = ?

A. y = -9 sin x -  cos x + 9x -  cos 2x
B. y = 9 sin x +  cos x + 9x -  cos 2x
C. y = 9 sin x -  cos x + 9x -  sin 2x
D. y = 9 sin x -  cos x + 9x -  cos 2x

Mathematics

Solve.6 +  - x = 0

A. 3 B. 3, 12 C. 12 D. empty set solution

Mathematics

Rationalize the denominator. Assume that all variables represent positive real numbers.

A. 41
B.
C. 5 
D.

Mathematics

Find the sum, if it exists.-30 - 100 -  -  + . . .

A. - 
B.
C. - 
D. Does not exist

Mathematics