Find the indicated term of the geometric sequence.a1 = 3, r = -1; Find a4.
A. a4 = -27
B. a4 = -3
C. a4 = 0
D. a4 = 3
Answer: B
Mathematics
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Find the interval of convergence of the series.
A. 0 < x < 2 B. -1 < x < 3 C. x < 3 D. -3 < x < 3
Mathematics
Solve the initial value problem.v'(t) + 
= 6, v(-1) = 0
A. v = -18e-t/3 - 1/3 + e1/3 B. v = -18(e-t/3 - 1/3 - 1) C. v = 2e-t/3 - 1/3 + 2 D. v = -18(et/3 + 1/3 + 18)
Mathematics
Add or subtract as indicated. Simplify, if necessary. 
- 
A. 
B. 
C. - 
D. - 
Mathematics
Solve using the addition principle.-15 + n = 17
A. -2 B. 2 C. -32 D. 32
Mathematics