In the original algorithm of rational number, the following new operation symbol "△" is added: when a > b, a△b=2b; when a≤b, a△b=3a Then when x=4, the value of (3△x)*x-(5△x) is ("." and "-" are still multiplicative sign and minus sign in rational operation) In the original algorithm of rational number, the following new operation symbol "△" is added: when a > b, a△b=2b; when a≤b, a△b=3a Then when x=4, the value of (3△x)*x-(5△x) is ("." and "-" are still the multiplication sign and subtraction sign in rational operation)

In the original algorithm of rational number, the following new operation symbol "△" is added: when a > b, a△b=2b; when a≤b, a△b=3a Then when x=4, the value of (3△x)*x-(5△x) is ("." and "-" are still multiplicative sign and minus sign in rational operation) In the original algorithm of rational number, the following new operation symbol "△" is added: when a > b, a△b=2b; when a≤b, a△b=3a Then when x=4, the value of (3△x)*x-(5△x) is ("." and "-" are still the multiplication sign and subtraction sign in rational operation)

(3△X)*x-(5△x)
=(3△4)*4-(5△4)
=9*4-2*4
=36-8
=28

If a and b are rational numbers, define the value of the new operation "*": a*b =1/5 times [3a-2b ],[1*9]*[9*6] No description If a and b are rational numbers, define the value of new operation "*": a*b =1/5 times [3a-2b ],[1*9]*[9*6] No description

0