a1 = a2 = 2, an = an - 1 - 1, n > 2. Find a5. - Vidyadip

MCQ

a₁ = a₂ = 2, a_n = a_n- 1 - 1, n > 2. Find a₅.

A
2
B
-1
C
1
D
0

✓

Answer

-1

Solution:

⇒ a_n = a_n -1 -1, n > 2

⇒ a₃ = a₂ - 1 = 2 - 1 = 1

⇒ a₄ = a₃ 1 = 1 1 = 0

⇒ a₅ = a₄ -1 = 0 - 1 = -1.

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