Define a*b=a+b/1-ab as an operation of rational number range, calculate (-2)*5 Define a*b=a+b/1-ab as an operation of rational number range, and calculate (-2)*5 | Math enthusiast | Mathematical art

Define ab=a+b/1-ab as an operation of rational number range, calculate (-2)5 Define ab=a+b/1-ab as an operation of rational number range, and calculate (-2)5

An operation in the range of a × b =1- ab fraction a + b + rational number to obtain the value of (1×2)×(-3) An operation in the range of an operation in the range of a × b =1- ab fraction a + b + rational number, and find the value of (1×2)×(-3)

According to your definition,1×2=1-2/3, which is 1/3, the same as 1/3×(-3)=1-[1/3×(-3)]1/3+(-3), so the answer is 5/8..

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