100, -97,-94,-91 ..... 求n term |
100, -97,-94,-91 ..... 其實唔 -100, -97,-94,-91 ..... 我記得中一做過 |
個100無負的 其實系有條唔識既中一仔打黎問我 |
一句講晒,冇可能 arithmetic sequence一係全部有負,一係全部冇負 |
咁100,-97,94,-91? |
咁就有得做 lol (103-3n)(-1)^2n |
唔該曬 |
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