Giup minh nhe
Khong tinh tong cua 3 phan so sau, hay chung to rang tong do nho hon 2:
A = 11/29 + 9/17 + 10/19
chung to rang tong cua 3 phan so sau nho hon 2 :A=10/27 ,9/16,11/24
Chung minh rang tong cua mot phan so duong voi so nghich daocua no thi khong nho hon 2
chung to rang tong sau nho hon 2 A=6/17+9/16+11/34
chung minh rang tong cua 1 phan so duong voi so nghich dao cua no ko nho hon 2
Tim phan so co tong bang 4 biet rang phan so do lon hon 13/17 va nho hon 13/15 {{ai giai dc to cho 1 tick. the do}
tinh tong cac uoc so cua 5.2^10.neu khong tinh ket qua cua tong thi co chung minh duoc tong la B(6) hay khong
tinh tong cac phan so toi gian khong la so tu nhien co mau 11 lon hon 12 va nho hon 35
giup toi voi
Biet rang : BCNN(a,b).UCLN(a,b)
a, BCNN cua hai so la 600, UCLN cua chung nho hon 10 lan BCNN. So thu 1 la 120, tim so thu 2.
b, UCLN cua hai so la 12, BCNN cua chung lon gap 6 lan UCLN . So t 1 la 24, tim so t 2
c, Tong cua hai so bang 60, tong giua UCLN va BCNN cua chung la 84. Tim hai so do.
