What is the u'th term of -4, -6, -14, -28, -48, -74?
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What is the a'th term of -52, -103, -154, -205, -256?
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What is the q'th term of 70, 73, 76?
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What is the s'th term of 209, 429, 639, 833, 1005, 1149, 1259?
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What is the q'th term of 51177, 51178, 51179, 51180?
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What is the y'th term of -38, -62, -134, -278, -518?
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What is the r'th term of -125, -222, -317, -410, -501?
一个美术生