∑
TestPrep
Magic
Features
Entrance Test
Puzzles
Videos
Practice
Download Free
Features
Entrance Test
Puzzles
Videos
Practice
Download Free
← Back to Test
Problem 3 - Entrance Test
A sequence models Algeria’s solar-energy capacity: a₁=2, a₂=5, and aₙ=3aₙ₋₁–2aₙ₋₂ for n≥3. What is a₆?
A. 65
B. 97
C. 129
D. 161
Check Answer
Show Solution
Correct: B
Recurrence gives a₃=11, a₄=23, a₅=47, a₆=97.