Tìm x biết: 4/(x+2).(x+6) + 7/(x+6).(x+13) = 2x+1/(x+2).(x+16) - 3/(x+13).(x+16)
Tìm x biết: 4/(x+2).(x+6) + 7/(x+6).(x+13) = 2x+1/(x+2).(x+16) - 3/(x+13).(x+16)
Tìm x biết: 4/(x+2).(x+6) + 7/(x+6).(x+13) = 2x+1/(x+2).(x+16) - 3/(x+13).(x+16)
Tìm x biết: \(\frac{4}{\left(x+2\right).\left(x+6\right)}+\frac{7}{\left(x+6\right).\left(x+13\right)}=\frac{2x+1}{\left(x+2\right).\left(x+16\right)}-\frac{3}{\left(x+13\right).\left(x+16\right)}\)
Tìm x biết: \(\frac{4}{\left(x+2\right).\left(x+6\right)}+\frac{7}{\left(x+6\right).\left(x+13\right)}=\frac{2x+1}{\left(x+2\right).\left(x+16\right)}-\frac{3}{\left(x+13\right).\left(x+16\right)}\)
Tìm số nguyên x ,nếu biết
a, \((\dfrac {1}{2}-\dfrac {1}{6}).3^x+3^{x+1}= 3^{16}+3^{13}\)
b, \((\dfrac {1}{2}-\dfrac {1}{3}).6^{x+2}-6^x = 6^{14}-6^{13}\)
c, \((\dfrac {1}{3}+\dfrac {1}{6}).2^{x+4}-2^x=2^{13}-2^{10}\)
d, \((\dfrac {1}{2}-\dfrac {1}{6}.3^{x+4} - 4.3^x =3^{16}-4.3^{13}\)
Tìm số nguyên x, nếu biết
a, \((\dfrac{1}{2}-\dfrac {1}{6})3^x +3^{x+2}= 3^{16}+3^{13}\)
b, \((\dfrac {1}{2}-\dfrac{1}{3}).6^x +6^{x+2}= 6^{15}+6^{18}\)
c, \((\dfrac{1}{3}+\dfrac{1}{6})2^{x+3} -2^x = 2^{22}-2^{20}\)
Tìm x \(\left(\frac{1}{2}-\frac{1}{6}\right).3^x+3^{x+1}=3^{16}+3^{13}\)
a) A=(3/11+1-3/7:3+9/11-9/7)-(1/3+0.25-1/5+0.125:7/6+7/8-0.7+7/16)=
b) B=(1/3+1/6*(1+2)+1/9*(1+2+3)+.....+1/6045*(1+2+3+....+2015)
c) Cho x, y thỏa mãn (x-5)^2+|2y-7|=0
d) Tìm x, y, z biết :
X/10=y/5,x=z/2 và
X^2+2*y^2-3*z^2=-650
e) tìm giá trị nhỏ nhất của:
D=|2x-22|+|12-x|+2|x-13|
f) c/m:nếu:
X/a+2b+c=y/2a+b-c=z/4a-4b+c
Thì
a/x+2y+z=b/2x+y-z=c4x-4y+z
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