(-2)@(-5)
=(-2)×[(-2)+(-5)]
=(-2)×(-7)
=14
【(-2)@(-5)】*(-4)
=14*(-4)
=14×(-4)+1
=-55
已知有理数A、B,现规定运算“@":a@b=a(a+b),规定运算“*":a*b=a×b+1,
已知有理数A、B,现规定运算“@":a@b=a(a+b),规定运算“*":a*b=a×b+1,
求【(-2)@(-5)】*(-4)的值
求【(-2)@(-5)】*(-4)的值
数学人气:920 ℃时间:2019-09-29 01:48:51
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