Question

what is the sum (a-1)/(abc^(3))+(3-b)/(abc^(3))

Answer 1

The answers are,
A: a - b - 3/abc^3
B: a - b - 3/abc^3
C: a - 4 + b/abc^3
D: a - b + 2/abc^3

Answer 2

The common denominator for both fractions is abc^3.

(a-1)/(abc^3) + (3-b)/(abc^3) = (a-1 + 3-b)/(abc^3)
= (a+2-b)/(abc^3)

Therefore, the sum is (a+2-b)/(abc^3)

Answer 3

Let's simplify the expression further:

(a-1)/(abc^3) + (3-b)/(abc^3)
= (a + 3 - 1 - b) / (abc^3)
= (a + 2 - b) / (abc^3)

So the correct answer is A: a + 2 - b / (abc^3)