`((469+174)^2-(469-174)^2)/(469xx174)=?` (a) 2 (b) 4 (c) 295 (d) 643

2 6 33 49 174 210 ?

3/8 of 168xx15-:15+?=549-:9+235 (a) 107 (b) 174 (c) 189 (d) 296 (e) None of these

The positive square root of ((a + b) ^(2) - (c + d) ^(2))/( (a + b) ^(2) - (c - d ) ^(2)) xx ((a + b + c) ^(2) - d ^(2))/( (a + b -c ) ^(2 ) - d ^(2)) using factorisation is:

0.295 + 2.95 + 29.5 + 295 = ?

The equilibrium constant for CN^(-) + CH_(3)COOH hArr HCN + CH_(3)COO^(-) is: (Given pK_(b) for CN^(-) = 4.69 and pK_(b) for CH_(3)COO^(-) = 2.25 )