Question

considere a fração

 x² - 2x + 1          onde x ≠ 1
_________
x - 1
Calcule a alternativa que melhor representa o valor númerico para x=4

Answer 1

Resolução da questão, veja:

$\mathsf{\dfrac{x^{2} -2x+1}{x-1}}}~\to~\mathsf{x\neq1~\textsf{e}~x=4}}\\\\\\\\\ \mathsf{\dfrac{4^{2}-2~\cdot~4+1}{4-1}}}\\\\\\\\\ \mathsf{\dfrac{16-8+1}{3}}}\\\\\\\\ \mathsf{\dfrac{8+1}{3}}\\\\\\\\ \mathsf{\dfrac{9}{3}}}\\\\\\\\\ \large\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\mathsf{3.}}}}}}}}}}}}}}}}}}}}}}}}}}$

Espero que te ajude '-'