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If the fifth term of a G.P. is 80 and first term is 5, what will be the 4th term of the G.P.? (a) 20 (b) 15 (c) 40 (d) 25 |
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Answer» Correct option (c) 40 Explanation: 5r4 = 80 → r4 = 80/5 → r = 2. Thus, 4th term = ar3 = 5 × (2)3 = 40. |
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