1.

If $$ {a={1+x over 2-x}}$$, then find the value $$ {1 over {a+1}}+{2a+1 over{a^{2}-1}}$$ ?

A. $$ {(1+x)(2+x) over {2x-1}}$$
B. $$ {(1-x)(2-x) over {x-1}}$$
C. $$ {(1+x)(2-x) over {2x-1}}$$
D. $$ {(1+x)(2-x) over {2x+1}}$$
Answer» D. $$ {(1+x)(2-x) over {2x+1}}$$


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