Find a G.P. for which sum of the first two terms is `-" "4` and the fifth term is 4 times the third term.

Find a G.P. for which the sum of first two terms is -4 and the fifth is 4 times the third term.

In a G.P. the product of the first four terms is 4 and the second term is the reciprocal of the fourth term. The sum of infinite terms of the G.P is

Find n and x in the expansion of (1 + x)^n , if the fifth term is four times the fourth term and the fourth term is 6 times the third term.

Find the sum of the first 40 terms of the A.P. whose 4th term is 8 and 6th term is 14.

In a G.P. of real numbers, the sum of the first two terms is 7. The sum of the first six terms is 91. The sum of the first four terms is "______________"

The product of three consecutive terms of a GP Is -64 and the first term is four times the third. Find the terms.

In an A.P. the third term is four times the first term, and the sixth term is 17 , find the series.

Find the sum off the terms of an infinite decreasing G.P. in which all the terms are positive, the first term is 4, and the difference between the third and fifth term is equal to 32/81.

The second term of a G.P. is 2 and the sum of infinite terms is 8. Find the first term.

The sum of the first three terms of G.P. is 7 and the sum of their squares is 21. Determine the first five terms of the G:P.