Question: 3 The first term of a geometric sequence is -. and its common ratio is -3. If the sum of the first n terms of

3 The first term of a geometric sequence is -. and

3 The first term of a geometric sequence is -. and its common ratio is -3. If the sum of the first n terms of the sequence is -984, find a. the value of n. b. the sum of the nth term to the (n+3 ) th term

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