2/5 x 1/x + 1/x x 2 + 2/5 = 1/2
1/x x ( 2/5 + 2 ) + 2/5 = 1/2
1/x x 6/5 + 2/5 = 1/2
1/x x 6/5 = 1/2 - 2/3
( 1 : x) x 6/5 = -1/6
1:x = -1/6 : 6/5
1: x = -5/36
⇔ x = -36/5.
Vậy x = -36/5.
cac ban giup toi cau nay voi:
Thuc hien phep tinh(hop ly neu co the):
(10/99+11/199-12/299)x(1/2-1/3+-1/6)
mong cac ban giup minh nhanh voi a. Minh xin cam on
| x + 2 | = | -50 | + ( -48 )
giup toi voi, toi chua hoc phep tru cac so nguyen am
15^2<11.x<16^2
giup toi voi
Lam on giup toi voi:
tim x thuoc Z:
a, ( x + 1 ) . ( x + 5 ) < 0
{x^2 -[ 6^2-(8^2-9*7)^3-7*5 ]^3-5*3 }^3=1
giup toi nhe
hay giup toi voi
a, 240:(x-5)=22.52-20
Cac ban giup toi co loi giai doi voi bai toan nay nhE
(x-3)2=25
Giup toi giai bai toan:
1+2/6+2/12+.....+2/x(x+1)=3980/1991
Cho minh cong thuc tinh bai nay di :
Chung to rang: 1/101 + 1/102 + ... + 1/299 + 1/300 > 2/3
Ai do xin hay giup toi voi !!!!!!
