如果规定符号“*”的意义是a*b=ab/a+b,求2*(-3)*4的值
2*(-3)*4
=【2×(-3)/(2-3)】*4
=6*4
=(6×4)/(6+4)
=2.4
已知(a+1)的平方+(2b-3)的平方+(c-1)的绝对值=0,
a+1=0 a=-1
2b-3=0 b=1.5
c-1=0 c=1
ab/3c+(a-b)/b
=-1*1.5/(3*1)+(-1-1.5)/1.5
=-1/2-5/3
=-13/6
如果规定符号“*”的意义是a*b=ab/a+b,求2*(-3)*4的值
2*(-3)*4
=【2×(-3)/(2-3)】*4
=6*4
=(6×4)/(6+4)
=2.4
已知(a+1)的平方+(2b-3)的平方+(c-1)的绝对值=0,
a+1=0 a=-1
2b-3=0 b=1.5
c-1=0 c=1
ab/3c+(a-b)/b
=-1*1.5/(3*1)+(-1-1.5)/1.5
=-1/2-5/3
=-13/6