Question

prove that in any arithamatic sequence sum of the 25th term and 15term is twice 20th ter​

Answer 1

Answer:

Combs are used by humans to separate tangled hairs, to keep their hair clean and to style their hair. They are also used as a decoration for hair. Combs are used in the making of thread from fibers like wool or cotton. Combing makes all the fibres point the same way so a thread can be spun.