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12-1 + + 4. The series £9) .. is a geometric series. 4 n=1 Which of...

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12-1 + + 4. The series £9) .. is a geometric series. 4 n=1 Which of the following is true? (a) The series is convergent and i
12-1 + + 4. The series £9) .. is a geometric series. 4 n=1 Which of the following is true? (a) The series is convergent and its sum is less than 1/2. (b) The series is convergent and its sum is 1/2. (c) The series is convergent and its sum is 2/3. (d) The series is convergent and its sum is more than 2/3. IS 5. For positive numbers a and r, it is known that the geometric series divergent. Which of the following is true? (a) 5-1. (b) -1 <r<1. (c) r> 1. (d) r2 a.

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solution co hl Σ (1) sum of infinire inop is 9 (ric) Y ratio of two term hirst team, consecutive term. S- 243 312 ting series

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