1.

Factorise\[:\]\[\frac{{{a}^{2}}}{{{b}^{2}}}+2+\frac{{{b}^{2}}}{{{a}^{2}}}\].

A. \[{{\left( \frac{a}{b}+\frac{b}{a} \right)}^{2}}\]           
B.        \[{{\left( 1+\frac{a}{b} \right)}^{2}}\]
C. \[{{\left( 1-\frac{b}{a} \right)}^{2}}\]    
D.        \[{{\left( \frac{b}{a}-\frac{a}{b} \right)}^{2}}\]             
Answer» B.        \[{{\left( 1+\frac{a}{b} \right)}^{2}}\]


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