Cho $\dfrac{1}{{a - b}} + \dfrac{1}{{b - c}} + \dfrac{1}{{c - a}} = 0,8336$
Tính $B = \dfrac{1}{{{{\left( {a - b} \right)}^2}}} + \dfrac{1}{{{{\left( {b - c} \right)}^2}}} + \dfrac{1}{{{{\left( {c - a} \right)}^2}}}$
kq = 0,69488896
$B=0,8336^2=0,69488896$
0,69488896
