So file(x) = 0. Locating the zeroes of this operate is similar to solving this equation. From the paragraph before, the zeroes of this purpose are +one and −1, so they are the methods of this equation. We bought this equation by subtracting the same point from both sides, https://financefeeds.com/tether-co-founder-aims-to-raise-1-billion-for-copyright-reserve-fund/