3┼6=3³-3*6+3-1=27-18+3-1=9+2=11
(1┼3)┼(-3)=(1³-1*3+1-1)┼(-3)
=(1-3+1-1)┼(-3)
=(-2)┼(-3)
=(-2)³-(-2)*(-3)+(-2)-1
=-8-6-2-1
=-17
ab为有理数,如果规定一种新的运算,即“+”,定义a+b=a^3-ab+a-1,请根据+的意义计算下列各题:
ab为有理数,如果规定一种新的运算,即“+”,定义a+b=a^3-ab+a-1,请根据+的意义计算下列各题:
“+”是一种新的符号
3‘+“6=
(1+3)+(-3)=
“+”是一种新的符号
3‘+“6=
(1+3)+(-3)=
数学人气:741 ℃时间:2019-09-22 07:10:06
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