Question: Question 3: An arithmetic sequence has terms a1, a2, a3..., an. For the first 24 terms of the sequence, it is known that a, +

Question 3: An arithmetic sequence has terms a1, a2, a3..., an. For the first 24 terms of the sequence, it is known that a, + as + a10 + a15 + azo + a24 = 225. (a) Find the partial sum of the first 24 terms of the sequence. / 5A Question 4: The 1st, 5th, and 13th terms of an arithmetic sequence are the first three terms of a geometric sequence with common ratio 2. (a) If the 21st term of the arithmetic sequence is 72, calculate the sum of the first 10 terms of the geometric sequence /5A

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