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[" 74.If the normal to "y=f(x)" makes an...

[" 74.If the normal to "y=f(x)" makes an angle of "(pi)/(4)" .with "],[" -axis at "(1,1)" ,then "f'(1)" is equal to "],[[" (1) "1," (2) "3],[" (3) "-1," .(4) "2]]

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