1.

Simplify \[\frac{a{{b}^{2}}{{c}^{3}}\times {{a}^{4}}{{b}^{5}}{{c}^{-5}}}{{{a}^{-7}}{{b}^{-8}}{{c}^{9}}\times {{a}^{10}}{{b}^{11}}{{c}^{-12}}\times {{a}^{13}}{{b}^{-14}}{{c}^{15}}}\].

A.  \[{{a}^{11}}{{b}^{18}}{{c}^{-15}}\]
B.  \[{{a}^{11}}{{b}^{18}}{{c}^{15}}\]
C.  \[{{a}^{-11}}{{b}^{-18}}{{c}^{15}}\]
D.  \[{{a}^{-11}}{{b}^{18}}{{c}^{-15}}\]  
Answer» E.


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