minh hieu roi bn hoc lop 6 thi minh moi hoc lop 5 sao ma biet
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cho S=3/10+3/11+3/12+3/13+3/14.Chung minh S khong phai la so tu nhien
Cho S=3/10+3/11+3/12+3/13+3/14. Chung minh 1<S<2. Tu do cho biet S co phai la so tu nhien khong
Tìm số nguyên x biết:
a) -2.(x+6)+6.(x-10)=8
b) -4.92x+9)-(-8x+3)-(x+13)=0
c) 7x.(2+x)-7x.(x+3)=14
Minh dang can gap ban nao co the giup minh duoc khong??
a) chung to A=3+3^3+...+3^1991 chia het co 13 ,41
b)n(n+1)(n+2) chia het cho 2 ,3
ai giup minh truoc minh se like cho .minh dang can gap
Tim hai so tu nhien biet tong cua chung la 27, UCLN la 3, BCNN la 60
Giup minh nha ! Minh dang can gap lam !
A= 3/10 + 3/11 + 3/12 + 3/13 + 3/14
Chung to rang A ko phai la so tu nhien
tim so tu nhien co 3 chu so .biet rang so do chia 8 du 5 ;chia 11 du 6
giup minh nhe ,minh dang can gap
thank you
ai nhanh nhat minh duyet cho
1.a, cho a=3+3^2+3^3+3^4+...+3^90. chung minh rang achia het cho 11 vs 13
b, tim tat ca cac cap so nguyen x,y sao cho x.y-2x+y+1=0
minh dang can gap nhanh len cac ban@gmail.cm
a) 92/9 + 13/5 - 56/9
b) 58/7 - (31/9 + 30/7)
c) 2/3 + 1/3 x 9/4 - 13/12
d) 41/8 - 7/4 : 11/5
e) 478/19 : 5/4 - 668/19 : 5/4
f) 32/21 x 49/45 : 16/22 x 15/33
g) 2020x2018+9 / 2019x2020-2011.
Giup minh voi minh dang can gap!!!