1,1,2,3,5,---------9th term of the sequence is

  • Option 1)

    13

  • Option 2)

    34

  • Option 3)

    21

  • Option 4)

    Non of these

 

Answers (1)
V Vakul

As learnt in concept

General term of the sequence -

The nth term of sequence denoted by Tn.

- wherein

For any n, there shall be a unique value for the nth  term.

 

 1,1,2,3,5,....

This is fibonacci sequence.

where T_{n+2}= T_{n+1}+T_n

T_6=3+5=8, \: \: T_7=8+5=13,\: \: T_8= 13+8=21\: and \: \: \: T_9= 21+13=34

 

 


Option 1)

13

Incorrect option

Option 2)

34

Correct option

Option 3)

21

Incorrect option

Option 4)

Non of these

Incorrect option

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