1,10,31,70,133()A 136 B 186 C 226 D 2560,1,3,8,22,63()A 163 B 174 C 185 D 196(),36,19,10,5,2A 77 B 69 C 54 D 481,4,8,14,24,42()A 76 B 66 C 64 D 68
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![1,10,31,70,133()A 136 B 186 C 226 D 2560,1,3,8,22,63()A 163 B 174 C 185 D 196(),36,19,10,5,2A 77 B 69 C 54 D 481,4,8,14,24,42()A 76 B 66 C 64 D 68](/uploads/image/z/10217985-33-5.jpg?t=1%2C10%2C31%2C70%2C133%EF%BC%88%EF%BC%89A+136+B+186+C+226+D+2560%2C1%2C3%2C8%2C22%2C63%EF%BC%88%EF%BC%89A+163+B+174+C+185+D+196%EF%BC%88%EF%BC%89%2C36%2C19%2C10%2C5%2C2A+77+B+69+C+54+D+481%2C4%2C8%2C14%2C24%2C42%EF%BC%88%EF%BC%89A+76+B+66+C+64+D+68)
1,10,31,70,133()A 136 B 186 C 226 D 2560,1,3,8,22,63()A 163 B 174 C 185 D 196(),36,19,10,5,2A 77 B 69 C 54 D 481,4,8,14,24,42()A 76 B 66 C 64 D 68
1,10,31,70,133()A 136 B 186 C 226 D 2560,1,3,8,22,63()A 163 B 174 C 185 D 196(),36,19,10,5,2A 77 B 69 C 54 D 481,4,8,14,24,42()A 76 B 66 C 64 D 68
1,10,31,70,133()A 136 B 186 C 226 D 2560,1,3,8,22,63()A 163 B 174 C 185 D 196(),36,19,10,5,2A 77 B 69 C 54 D 481,4,8,14,24,42()A 76 B 66 C 64 D 68
1,10,31,70,133()这是一个二级等差,第一次为9,21,39,63,93第二次差为12,18,24,30等差为6所以选C,133+93=2260,1,3,8,22,63()0*3+1=11*3+0=33*3-1=88*3-2=2222*3-3=6363*3-4=185所以选C 就是前一个数乘3后减去-1,0,1,2,3,4等于后一项(),36,19,10,5,2A 77 B 69 C 54 D 48选B 6969+3=72/2=3636+2=38/2=1919+1=20/2=1010+0=10/2=55-1=4/2=2前一个数+3,2,1,0,-1后除2等后一数.1,4,8,14,24,42()A 76 B 66 C 64 D 68后减前差为3,4,6,10,18,34再减得1,2,4,8,16等比为2所以选A ,76=42+34这是个等差和等比的交叉数列规律