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[" 2.Let the mapping "f(x)=ax+b,a>0," ma...

[" 2.Let the mapping "f(x)=ax+b,a>0," maps "[-1,1]" onto "[0]],[" show that "cot(cot^(-1)7+cot^(-1)8+cot^(-1)18)=f(2)]

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If the mapping f(x)=ax+b, a>0 maps [-1,1] on to [0,2] then cot[cot^(-1)(7)+cot^(-1)(8)+cot^(-1)(18)] is equal to

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