Asosiy tarkibga o'tish

1.10-bo'lim : Umumiy grafiklar

6. Grafik kalkulyatordan foydalanmasdan \(h\left( x \right) = {\left( {x - 3} \right)^2} + 4\) grafigini chizing.

Yechim

Ushbu bo'limning birinchi bir nechta muammolarida biz ishlatgan algebraik o'zgarishlarni bir vaqtning o'zida grafikni yuqoriga/pastga va o'ngga/chapga siljitish uchun birlashtirish mumkin. Agar biz \(g\left( x \right)\) ning grafigini bilsak, \(g\left( {x + c} \right) + k\) grafigi oddiygina \(g\left( x \right)\) ning grafigi, agar \(c < 0\) bo‘lsa, \(c\) birliklari bilan o‘ngga siljiydi yoki \(c > 0\) bo‘lsa, \(c\) birliklari bilan chapga siljiydi va \(k\) birliklari pastga siljiydi10 \(k\) birliklari, agar \(k < 0\).

Shunday qilib, bizning holatlarimizda \(g\left( x \right) = {x^2}\), biz buni ko'rishimiz mumkin,

\[h\left( x \right) = {\left( {x - 3} \right)^2} + 4 = g\left( {x - 3} \right) + 4\]

va shuning uchun bizdan eskiz qilishimiz so‘ralayotgan grafik \(g\left( x \right) = {x^2}\) ning o‘ngga 3 birlikka va 4 birlikka yuqoriga siljigan grafigi.

Mana \(h\left( x \right) = {\left( {x - 3} \right)^2} + 4\) grafigi va shuni yodda tutingki, transformatsiyani ko'rishga yordam berish uchun biz \(g\left( x \right) = {x^2}\) grafigida ham chizganmiz.

The graph of \(h\left( x \right) = {\left( {x - 3} \right)^2} + 4\), drawn as a solid red curve, along with the graph of \(g\left( x \right) = {x^2}\), drawn as a dashed gray curve.  Both are parabolas that open upward.  The vertex of \(g\left( x \right)\) is at the origin and the vertex of \(h\left( x \right)\) is at (3,4), so the graph of \(h\left( x \right)\) is the graph of \(g\left( x \right)\) shifted right 3 units and up 4 units.