1^1=1
2^2=4
3^3=9
5^5=3150
Vậy phải điền vào
4^4=256
1^1=1
2^2=4
3^3=9
5^5=3150
Vậy phải điền vào
4^4=256
Cho day so 1,1,1,1,2,1,1,3,3,1,1,4,6,1,1,5,10,10...
Tim tong 7 chu so tiep theo cua day so
Tim so tiep theo cua dãy 1,5,17,53,61,...
Tich cua hai so tu nhien lien tiep lon hon tong cua chung la181.tim hai so do?
Tìm so co hai chự số biết tổng hai cu so cua no nho hon so do 6 lan . Neu them 25 vao tich cua hai chu so cua no se duoc so viet theo thu tu nguoc lai cua so can tim
Cho S nam o ben ngoai duong tron (O). Tu S ve tiep tuyen SA, SB cua (O) (A, B la cac tiep diem ). Tu giac OASB noi tiep. SO cat (O) tai D, E( D nam giua S va O). Goi M la diem ching giua cung DE khong chua diem A cua (O). AM cat SO. SN =SA
AB cat SO tai I. Chung minh DS.EI=ES.DI
tim 2 so biet tong cua chung la 17 va khi tang so thu nhat len 3 don vi so thu 2 len 2 don vi thi tich cua chung la 105.tim 2 so da cho
so diem cach deu mot duong tron va hai tiep tuyen song song cua duong tron do la:...........
cho duong tron tam O duong kinh AB .Ve hai day AM va BN song song voi nhau sao cho so do BM nho hon 90 do .Ve day MD song song voi AB.Day DN cat AB tai E. Tu E ve 1 duong thang song song voi AM cat duong thang DM tai C. Chung minh
a)AB vuong goc DN
b)BC la tiep tuyen cua duong tron (O)
cho tam giac ABC nhon, M la trung diem cua AB.Cac duong cao AH,BD,CF cat nhau tai I. duong cao qua C va song song voiAH cat BD tai P
a,CM: PI*AB=AC*CI
b, goi (O) la duong tron ngoai tiep tam giac CDH. CM: MD la tiep tuyen cua duong tron (O)
c,cho doan thang AB=a, so do goc ACB=b.tinh do dai doan thang MO theo a va b