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" (v) "quad " If "y=(sec^(-1)x)^(2),x>0,...

" (v) "quad " If "y=(sec^(-1)x)^(2),x>0," show that "x^(2)(x^(2)-1)(d^(2)y)/(dx^(2))+(2x^(3)-x)(dy)/(dx)-2=0

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