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Custom-Defined Operations and Symbols
Grade Level
GMAT
Q.150 Custom-Defined Operations and Symbols
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A sequence is defined by d1 = 1, d2 = 4, and d(n) = 2d(n - 1) - d(n - 2) + 1 for n ≥ 3. What is d4?
A
8
B
11
C
12
D
13
E
16
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