If f is a real function such that f(x) >...

If `f` is a real function such that `f(x) > 0,f^(prime)(x)` is continuous for all real `x` and `a xf^(prime)(x)geq2sqrt(f(x))-2af(x),(a x!=2),` show that `sqrt(f(x))geq(sqrt(f(1)))/x ,xgeq1`.

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