Violympic toán 7
Các câu hỏi tương tự
bài 1 a x/24=-7/8 bx+3/x-4=9/8 c x+7/5=x-1/7
a) 3/(x+2)(x+5) + 5/(x+5)(x+10) + 7/ (x+10)(x+7) = x/(x+2)(x+17)
tìm x,y bt:(x-7)^x+1-(x-7)^x+11=0
\(\dfrac{7^{x+2}+7^{x+1}+7^x}{57}=\dfrac{5^{2x}+5^{2x+1}+5^{2x+3}}{131}\)
tim x
Tìm x: x-6/7 + x-7/8 + x-8/9 = x-9/10 + x-10/11+x-11/12
7x+2 + 2 x 7x+1 + 345
Cho 3 đa thức: A(x)= -7+2x2+x4+3x5-x3
B(x)= -x+x4+2x3-7
C(x)= 2x-x4-3x3
Tính A(x)+B(x)-C(x)
Tìm x
a, 580 :( x -24 ) =329 -150 : 2
b, 7 (x-1 ) +35= 25 + 279 :9
c,4 ( 2x+ 7 ) -3 (3x -2 ) =24
d,( x-1 ) (x-2) =3(x-1)
e,( x+ 3 ) + ( x+7 ) + ( x + 11 ) + ........+ ( x+ 79 ) =860
TÌM x biết: \(\left(x-7\right)^{x+1}-\left(x-7\right)x+11=0\)