1.

If the digit 1 is placed after a two digit number whose tens digit is 'f and units digit is 'u?, the new number is

A.  \[\frac{5}{2}\] 
B.  \[\frac{a+5}{3a-5}=\frac{a-8}{a+8}\]
C.  \[2{{(a+b)}^{2}}-9(a+b)-5\]         
D. None of these
Answer» C.  \[2{{(a+b)}^{2}}-9(a+b)-5\]         


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