Question

seja a função f(x) =1/x2 determine o valor de: a)F(1/2) B) f.(√3)
me ajudem

Answer 1

Resolução da questão, veja:

Letra ''A'':

$\mathsf{f(x) =\dfrac{1}{x^{2}}}~\to~\mathsf{f\bigg(\dfrac{1}{2}\bigg)}}}}\\\\\\\\ \mathsf{f\bigg(\dfrac{1}{2}\bigg)=\dfrac{1}{\bigg(\dfrac{1}{2}\bigg)^{2}}}}\\\\\\\\ \mathsf{f\bigg(\dfrac{1}{2}\bigg)=\dfrac{1}{\bigg(\dfrac{1}{4}\bigg)}}\\\\\\\\ \mathsf{f\bigg(\dfrac{1}{2}\bigg)=1~\cdot~\dfrac{4}{1}}}}}\\\\\\\\\ \Large\boxed{\boxed{\boxed{\mathbf{f\bigg(\dfrac{1}{2}\bigg)=4.}}}}}}}}}}}}}}}}}}~~\checkmark}}}}}}}}}}$

Letra ''B'':
$\mathsf{f(x) =\dfrac{1}{x^{2}}}~\to~\mathsf{f(\sqrt{3})}}}}\\\\\\\\ \mathsf{f(\sqrt{3})=\dfrac{1}{(\sqrt{3})^{2}}}}\\\\\\\\ \mathsf{f(\sqrt{3})=\dfrac{1}{\sqrt{9}}}\\\\\\\\\ \Large\boxed{\boxed{\boxed{\mathbf{f(\sqrt{3})=\dfrac{1}{3}}}}}}}}}}}}}}}~~\checkmark}}}}}}}}}$

Espero que te ajude. ^_^