What is the a'th term of 51, 104, 157, 210, 263, 316?
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What is the v'th term of -46, -50, -54?
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What is the g'th term of 158, 157, 156?
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What is the x'th term of -26, -70, -144, -248?
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What is the q'th term of -83, -164, -243, -320, -395?
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What is the u'th term of 47, 49, 51, 53, 55, 57?
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What is the k'th term of 1470, 2922, 4374, 5826, 7278?
一个美术生