If the 4th term of an A.P. is zero, prove that the 25th term of the A.P. is three times its 11th term.

If the 9th term of an A.P is zero,prove that 29th term is double the 19th term.

The fourth term of an A.P is zero. Prove that the 25th term is triple its 11th term

The fourth term of an A.P is zero. Prove that the 25th term is triple its 11th term

If 9th term of an A.P. is zero, prove that its 29th term is double the 19th term.

The 6th term of an A.P. is zero. Prove that its 21st term is triple its 11th term.

The fourth term of an A.P is zero.Prove that the 25 th term is triple its 11 th term

The 7th term of an A.P. is zero. Prove that 25th term is twice the 16th term.

If the 9th term of an A.P is zero then show that the 29th term is twice the 19th term.

(i) 10 times the 10th term and 15 times the 15th term of an A.P. are equal. Find the 25th term of this A.P . (ii) 17 times the 17th term of an A.P. is equal to 18 times the 18th term. Find the 35th term of this progression.