若sn为等比数列前n项和,则sn,s2n

2025-02-16

sn为等比数列an的前n项和,s2=2,s3=-6

2025-02-16

记sn为等比数列an的前n项和若a5-a3=12

2025-02-16

sn为等比数列an的前n项和

2025-02-16

设sn为等比数列的前n项和,8a2+a5=0

2025-02-16

若sn/n为等差数列

2025-02-16

sn为等差数列an的前n项和若3s3=s2+s4

2025-02-16

等比数列的前n项和为sn已知s1s3s2成等差数列

2025-02-16

等比数列前n项和为sn,已知s4=10

2025-02-16

设sn是等比数列an的前n项和,若s4/s2=3

2025-02-16

若sn为等比数列前n项和,则sn,s2n

2025-02-16

sn为等比数列an的前n项和,s2=2,s3=-6

2025-02-16

记sn为等比数列an的前n项和若a5-a3=12

2025-02-16

sn为等比数列an的前n项和

2025-02-16

设sn为等比数列的前n项和,8a2+a5=0

2025-02-16

若sn/n为等差数列

2025-02-16

sn为等差数列an的前n项和若3s3=s2+s4

2025-02-16

等比数列的前n项和为sn已知s1s3s2成等差数列

2025-02-16

等比数列前n项和为sn,已知s4=10

2025-02-16

设sn是等比数列an的前n项和,若s4/s2=3

2025-02-16