Question

An arithmetic progression has a first term of -24. The nth term is -13.8 and the (2n)th term is -3. Find the value of n.

Answer 1

Answer:

From the given information, we can compile following data about two Geometric Progressions (G.P);

Expression for the sum to infinity of the Geometric Progression (G.P) when or ;

For the given cases;

Substituting the value of from first equation into the second;

please mark as Brainiest answer and give me like