What is the sum (a-1)/(abc³)+(3-b)/(abc³) ?
a. a-b-3/abc^3
b. a- b - 3/abc^3
c. a-4+b/abc^3
d. a-b+2/ abc^3
The sum is (a-1)/(abc^3) + (3-b)/(abc^3) = (a-1+3-b)/(abc^3) = (a+2-b)/(abc^3).
Therefore, the correct answer is b. a- b - 3/abc^3.
a. a-b-3/abc^3
b. a- b - 3/abc^3
c. a-4+b/abc^3
d. a-b+2/ abc^3
Therefore, the correct answer is b. a- b - 3/abc^3.