sn为等比数列an的前n项和

2025-02-13

sn为等比数列an的前n项和,s2=2,s3=-6

2025-02-13

记sn为等比数列an的前n项和若a5-a3=12

2025-02-13

等比数列an的前n项和为sn=32n-1+r

2025-02-13

等比数列an的前n项和为sn,已知s1,s3,s2成等差数列

2025-02-13

若sn为等比数列前n项和,则sn,s2n

2025-02-13

等比数列an前n项和为sn已知s1s3s2成等比求公比q

2025-02-13

等比数列前n项和sns2n s3n

2025-02-13

等比数列an的前n项和为sn,且4a1,2a2,a3

2025-02-13

等比数列an的前n项和sn=5n-1

2025-02-13

sn为等比数列an的前n项和

2025-02-13

sn为等比数列an的前n项和,s2=2,s3=-6

2025-02-13

记sn为等比数列an的前n项和若a5-a3=12

2025-02-13

等比数列an的前n项和为sn=32n-1+r

2025-02-13

等比数列an的前n项和为sn,已知s1,s3,s2成等差数列

2025-02-13

若sn为等比数列前n项和,则sn,s2n

2025-02-13

等比数列an前n项和为sn已知s1s3s2成等比求公比q

2025-02-13

等比数列前n项和sns2n s3n

2025-02-13

等比数列an的前n项和为sn,且4a1,2a2,a3

2025-02-13

等比数列an的前n项和sn=5n-1

2025-02-13