a_1 = a_2= 2, a_n = a_n- 1 - 1, n > 2. Find a_5. - Vidyadip

MCQ

$a_1 = a_2= 2, a_n = a_n- 1 - 1, n > 2$. Find $a_5$.

A
$2$
✓
$-1$
C
$1$
D
$0$

✓

Answer

Correct option: B.

$-1$

$ \Rightarrow a_n=a_n-1-1, n>2 $
$ \Rightarrow a_3=a_2-1=2-1=1 $
$ \Rightarrow a_4=a_3 1=11=0 $
$\Rightarrow a_5=a_4-1=0-1=-1 $

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