What is the r'th term of -79, -149, -219, -289?
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What is the h'th term of 1403, 2805, 4207?
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What is the b'th term of -101, -204, -311, -422?
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What is the l'th term of 62, 124, 192, 266?
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What is the f'th term of 135, 275, 415, 555, 695?
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What is the g'th term of -985, -987, -989, -991, -993, -995?
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What is the g'th term of -25, -32, -31, -16, 19, 80?
一个美术生