The fourth term of a geometric sequence is 2 and the sixt...
The fourth term of a geometric sequence is 2 and the sixth term is 8. Find the common ratio.
±1
±2
±3
±4
Correct answer is B
\(T_{n} = ar^{n - 1}\) (Exponential sequence)
\(T_{4} = ar^{3} = 2 .... (1)\)
\(T_{6} = ar^{5} = 8 ......(2)\)
Divide (2) by (1),
\(\frac{ar^{5}}{ar^{3}} = \frac{8}{2} \)
\(r^{2} = 4\)
\(r = \pm 2\)
Solve; \(\frac{P}{2} + \frac{k}{3}\) = 5 and 2p = k = 6 simultaneously...
Simplify: \(^{n}C_{r} ÷ ^{n}C_{r-1}\)...
Consider the following statements: X: Benita is polite y: Benita is neat z: Benita is intel...
Find the minimum value of \(y = 3x^{2} - x - 6\)....
Find the angle between i + 5j and 5i - J ...