Tim so nguyen x, biet :
a) (1/2 - 1/3) . 6x + 6x + 2 = 615 + 618.
b) (1/2 - 1/6) . 3x + 4 - 4 . 3x = 316 - 4 . 313.
Minh dang can gap. Ai biet thi chi giup minh voi nhe! Cam on moi nguoi .
Cho 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.
A = 1/1.2 + 1/3.4 + 1/5.6 + ... + 1/49.50
A =1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6 + ... + 1/49 - 1/50
A = (1 + 1/3 + 1/5 + ... + 1/49) - (1/2 + 1/4 + 1/6 + ... + 1/50)
A = (1 + 1/2 + 1/3 + 1/4 + 1/5 + 1/6 + ... + 1/49 + 1/50) - 2.(1/2 + 1/4 + 1/6 + ... +1/50)
A = B - 2C
=> đpcm
Ủng hộ mk nha ♡_♡☆_☆
Tim x biet /x-3/+/3x+4/=/2x+1/
Giup to vs! Cam on cac cau nhieu lam
Tra loi nhanh nhe to dang can gap
tim x
5/6x−3/4=−1/4+2/3
−1va1/2−2/3x=5/6−(−2/5)
(4/5:x+1,5):2/3=−1,5
4/3x−2/3=1/4−x
giup minh nhe minh dang can gap
Cac ban oi giup minh voi
tim x biet 6.4/x=x/99tim cac so nguyen biet (|x|-3)(x^2+4) be hon hoac bang 4hai dia diem a va b cach nhau 90kmhai nguoi di xe dap cung mot luc tu ava bde gap nhau va ho gap nhau cach a 50km;nhung neu nguoi di tu b di nhanh hon xuat phat truoc nguoi a 1 gio thi ho gap nhau cach a 350/9km tinh van toc moi nguoiCac giai ho minh voi minh se tick cho
Cac ban nho viet ho cach lam min voi
Tim x,y biet
x^2+y^6=0
Minh dang rat gap giup minh voi nhe. Minh cam on!
có x^2 và y^6 luôn lớn hơn hoặc = 0 với mọi x,y thuộc z
=> x^2 và y^6 = 0
=> x=0 và y=0
Ta co: x^2 >hoac= 0
y^6 >hoac=0
De x^2+y^6=0
=> x^2 = 0 va y^6 =0
+Neu x^2 =0 =>x =0
+Neu y^6 =0 =>y=0
Vay x=0 ; y=0
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.
1)Tim x biet :3x-1/40-5x
2)3 lop 7A ,7B ,7C trong duoc tat ca 1020 cay.So cay lop 7B trong duoc bang 8/9 so cay lop 7A trong duoc.So cay lop 7C trong duoc bang 17/16 so cay lop 7B trong duoc.Hoi moi lop trong duoc bao nhieu cay ?
3)Tim x trong ti le thuc :
a,x-1/x+5=6/7
b,x^2/6=24/25
c,x-2/x-1=x-4/x-7(x khac 1,x khac -7)
d,7/x-1=x+1/9
Moi nguoi giup minh voi nhe minh xin cam on
tim mot phan so biet rang neu phan so do tru di 1/5 roi lai them 1/4 thi duoc 5/4. Phan so can tim la: .................................
Giup minh voi minh dang can gap
CMR :
1/1.2 + 1/3.4 + 1/5.6 +.........+ 1/49.50 = 1/26 + 1/27 +.......+ 1/49 + 1/50.
Tim cac gia tri cua x de cac bieu thuc sau day nhan gia tri am :
a) x2 + 5x = A.
b) 3.(2x + 3) . (3x - 5).
Ai biet thi chi giup minh hai bai toan tren nhe ! Xin cam on moi nguoi. (Cang nhan cang tot,hihi)