Question 2
The following calculations lead to the conclusion that $\pi\gt{}2019$.
(1) Let $x=\pi=3.14159\ldots$.
(2) $\frac{2x+38}{x-1000}\lt{}4$.
(3) $2x+38\lt{}4(x-1000)=4x-4000$.
(4) $2x\gt{}4038\Rightarrow x\gt{}2019$.
(5) Therefore, $\pi\gt{}2019$.
Which transition is the first that contains an error?
(1) Let $x=\pi=3.14159\ldots$.
(2) $\frac{2x+38}{x-1000}\lt{}4$.
(3) $2x+38\lt{}4(x-1000)=4x-4000$.
(4) $2x\gt{}4038\Rightarrow x\gt{}2019$.
(5) Therefore, $\pi\gt{}2019$.
Which transition is the first that contains an error?