Các câu hỏi tương tự
Cho a+b=c+d va a^2+b^2=c^2+d^2.Chung minh rang:a^2022+b^2022=c^2022+d^2022
Moi nguoi giup minh voi,minh dang can gapCho A = 1/1.2 + 1/3.4 + 1/5.6 +.......+ 1/49.50.
B = 1 + 1/2 + 1/3 + 1/4 +........+ 1/49 + 1/50.
C = 1/2 + 1/4 + 1/6 +.........+ 1/48 + 1/50.
CMR A = B - 2C.
Minh dang can gap. Ai biet thi chi giup minh nhe ! Cam on moi nguoi nhieu lam.
Bo dau ngoac roi rut gon bieu thuc :
a) - ( -a + c - d ) - ( c- a + d )
b) - ( a + b - c + d ) + ( a - b - c - d )
c) a( b- c -d ) - a( b + c - d )
Giup minh nhe minh dang can gap
chung minh dang thuc
a.( b - c ) - a ( b + d ) = -a ( c + d )
giup minh voi lam onnnnn.......
bai 1, thuc hien phep tru
a, (a-1)-(a-3)
b, (2+b)-(b+1)
c, -(1-2)+(5-c)
d, -(a-c)-(a-b+c)
bai 2, tim x, biet
a, -x+8= -17
b, 35-x=37
c, -19-x= -20
d, 2130-(x+130)+72= -64
giup minh voi, minh can gap, cam on cac ban nhieu
Tim n€Z , biet:
a) n+8/n-5 la so nguyen.
b)n2+1/n-6 la so nguyen.
Giup minh voi minh dang can gap .
Lam chi tiet ho minh nha.
Cho 4 diem A,B,C,D .Biet rang ba diem B,C,D thang hang,ba diem B,A,C thang hang.Hoi 3 diem B,A,D co thang hang ko?Vi sao?
giup minh voi a
Tks
Cho A = 2014+2014^2+2014^3+...+2014^2014
CTR : A chia het cho 15
Giup minh voi nhe dang can gap lam...........
Tim x :
a ) 5x - 1 = 13
b ) ( x - 2 ) = 0
c ) 5 ( x - 7 ) + 8 = 0
d ) ( x - 19 ) * 4 = 36
e ) 3 ( x - 7 ) - 2 = 4
Giup minh voi ! Minh dang can gap lam !