complete 11th botany

If twice the 11th term of an AP is equal to 7 times its 21st term, then its 25th term is equal to

In a row at a bus stop, 'A' is 7th from the left and 'B' is 9th from the right. They both interchange their positions. Now A becomes 11th from the left. How many people are there in the row ?

father of botany' is

If seven times the 7th term of an AP is equal to eleven times the 11th term then what will be its 18th term?

The 6th term of an AP is five times the 1st term and the 11th term exceeds twice the 5th term by 3. Find the 8th term of the AP.

The 11th term of an AP -5, (-5)/(2) , 0, (5)/(2) , …

The 26th, 11th and the last terms of an AP are, 0, 3 and -(1)/(5) , respectively. Find the common difference and the number of terms.

Let a, b and c be the 7th, 11th and 13th terms, respectively, of a non-constant A.P.. If these are also the three consecutive terms of a G.P., then (a)/(c ) is equal to

Let a, b and c be the 7th, 11th and 13th terms respectively of a non-constant AP. If these are also the three consecutive terms of a GP, then (a)/(c) is equal to