The 7th term of a G.P. is 8 times the 4th term. The G.P. when its 5th term is 48, is.
⇒ r3 = 8 = 23 ⇒ r = 2.
Also t5 = 48 = ar4 = 48 or 16a = 48 ⇒ a = 3.
Hence the required G.P. is 3, 6, 12, 24 ……
The 4th of a G.P. is square of its second term, and the first term is - 3. Determine its 7th term.
The product of 3rd and 8th terms of a G.P. is 243. If its 4th term is 3, find its 7th term.