规定a△b=(a×k×b)÷(a×b)k为常数,已知5▽6=6▽5,求2▽4-4▽2的值。,`+]'e3N0X5?)C/Y
算式:提示:\(e4K,`+]'e3N0X5?)C/Y
答:2▽4-4▽2等于;M+v:s(b2v;U;r,k4F;c-]4j4}。,`+]'e3N0X5?)C/Y