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  • Give answer! If 19th term of a non-zero A.P. is zero, then its ( 49th term ) : ( 29th term ) is :

If 19th term of a non-zero A.P. is zero, then its ( 49th term ) : ( 29th term ) is : 

  • Option 1)

    2:1

  • Option 2)

    4:1

  • Option 3)

    3:1

  • Option 4)

    1:3

Answers (1)

best_answer

 

General term of an A.P. -

T_{n}= a+\left ( n-1 \right )d

- wherein

a\rightarrow First term

n\rightarrow number of term

d\rightarrow common difference

T_{n}=a+(n-1)d ........A.P.

T_{19}=0

T_{49}-T_{19}=30d

=>T_{49}=30d

T_{29}-T_{19}=10d

=>T_{29}=10d

=>T_{49}:T_{29}=30d:10d=3:1


Option 1)

2:1

Option 2)

4:1

Option 3)

3:1

Option 4)

1:3

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