In the previous problem, if $F ( \alpha ) = e ^ { - \alpha } \text {, then } f ( x )$ is
A) $x$
B) $1$
C) $1 / \left( \pi \left( 1 + x ^ { 2 } \right) \right)$
D) $2 / \left( \pi \left( 1 + x ^ { 2 } \right) \right)$
E) 0

Question

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The Answer of In the previous problem, if $F ( \alpha ) = e ^ { - \alpha } \text {, then } f ( x )$ is
A) $x$
B) $1$
C) $1 / \left( \pi \left( 1 + x ^ { 2 } \right) \right)$
D) $2 / \left( \pi \left( 1 + x ^ { 2 } \right) \right)$
E) 0

In the Previous Problem, If F(α)=e−α, then f(x)F ( \alpha ) = e ^ { - \alpha } \text {, then } f ( x )F(α)=e−α, then f(x)

In the Previous Problem, If $F ( \alpha ) = e ^ { - \alpha } \text {, then } f ( x )$