Asosiy tarkibga o'tish

1.10-bo'lim : Umumiy grafiklar

4. Grafik kalkulyatordan foydalanmasdan \(f\left( x \right) = \ln \left( x \right) - 5\) grafigini chizing.

Yechim

Asosiy algebraik o'zgarishlarni eslang. Agar biz \(g\left( x \right)\) grafigini bilsak, \(g\left( x \right) + c\) grafigi oddiygina \(g\left( x \right)\) ning grafigi, agar \(c < 0\) bo'lsa, \(c\) birliklari bilan pastga siljiydi yoki \(c > 0\) bo'lsa, \(c\) birliklari bilan yuqoriga siljiydi.

Shunday qilib, bizning holatlarimizda \(g\left( x \right) = \ln \left( x \right)\), biz buni ko'rishimiz mumkin,

\[f\left( x \right) = \ln \left( x \right) - 5 = g\left( x \right) - 5\]

va shuning uchun bizdan eskiz qilishimiz so'ralayotgan grafik tabiiy logarifm funksiyasining 5 birlik pastga siljigan grafigi.

Mana \(f\left( x \right) = \ln \left( x \right) - 5\) grafigi va esda tutingki, transformatsiyani ko'rishga yordam berish uchun biz \(g\left( x \right) = \ln \left( x \right)\) grafigida ham chizganmiz.

The graph of \(f\left( x \right) = \ln \left( x \right) - 5\), drawn as a solid red curve, along with the graph of \(g\left( x \right) = \ln \left( x \right)\), drawn as a dashed gray curve, for \(x\) between 0 and 5.  Both curves have a vertical asymptote at \(x = 0\) and increase slowly as \(x\) increases.  The graph of \(g\left( x \right)\) crosses the \(x\)-axis at (1,0) while the graph of \(f\left( x \right)\) passes through (1,-5), so it is the graph of \(g\left( x \right)\) shifted down 5 units.