What is the l'th term of 79, 161, 243?
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What is the a'th term of -5203, -10408, -15623, -20854, -26107, -31388?
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What is the l'th term of -833, -829, -825, -821, -817?
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What is the u'th term of 456, 457, 458, 459?
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What is the u'th term of -7, 17, 57, 113?
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What is the o'th term of 787, 783, 777, 769, 759, 747?
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What is the d'th term of 223, 226, 229, 232, 235, 238?
一个美术生