Someone play 8ball with me please.

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.