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The sequence [xn] is a GP with x2/x4 = 1/4 and x1 + x4 = 108. What will be the value of x3? (a) 42 (b) 48 (c) 44 (d) 56 |
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Answer» Correct option (b) 48 Explanation: Since the ratio of the 2nd to the fourth term is given as 1/4, we can conclude that the common ratio of the GP is 2. Also, a+ 8a= 108 → 9a = 108 → a = 12. Thus, x3 = 48. |
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