What is the r'th term of -125, -222, -317, -410, -501?
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What is the y'th term of -38, -62, -134, -278, -518?
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What is the q'th term of 51177, 51178, 51179, 51180?
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What is the u'th term of -4, -6, -14, -28, -48, -74?
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What is the r'th term of 33, 65, 97, 129, 161?
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What is the h'th term of -31, -19, 7, 53, 125, 229, 371?
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What is the r'th term of 254, 251, 246, 239, 230, 219, 206?
一个美术生