1.

If r ? -s and a = (r-s) / (r+s) +1 then a + 1=

A. 2r / (r+s) + 1
B. (r-s+1) / (r +s)
C. (2r-2s) / (r+s)
D. 2s / (r+s)
Answer» B. (r-s+1) / (r +s)


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