3.
a) x+14/86 + x+15/85 + x+16/84 + x+17/83 = -4
b)x-90/10 + x-76/12 + x-58/14 + x-36/16 + x-15/17 = 15
4.
a) x-1/2011 + x-2/2010 - x-3/2009 = x-4/2008
b)x+1/11 + x+1/12 = x+1/13 + x+1/14
5.
x+1/10 + x+1/11 + x+1/12 = x+1/13 + x+1/14
6.
2/(x+2)(x+4) + 4/(x+4)(x+8) + 6/(x+8)(x+14) = x/(x+2)(x+14)
Loga
Sinh Học lớp 12
