Find the first 4 terms of the recursively defined sequence.a1 = 9, an+1 = 
A. 9, - 
, - 
, - 
B. 9, 
, -9, 
C. 9, - 
, 9, - 
D. 9, - 
, - 
, 
Answer: C
Mathematics
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Solve the problem by integration.Find the root-mean-square of the voltage V = 430 sin 120?t (in V) for one period.
A. 215 V B. 120 V C. 304 V D. 430 V
Mathematics
The vector v has initial point P and terminal point Q. Write v as a position vector.P(-0.3, 6.8), Q(-3.9, 5.4)
A. 
B. 
C. 
D. 
Mathematics
Solve the system of equations by substitution.2x + 9y = -8 x + 
y = 
A. (5, -2) B. (5, 2) C. (-5, 2) D. ( -5, -2)
Mathematics
Find the sum using the formulas for the sums of powers of integers.
?
?
A. 33 B. 17 C. 30 D. 5 E. 9
Mathematics