新gre數(shù)學(xué)重要考點(diǎn):Substitution
2023新gre考試實(shí)施以來(lái),不僅對(duì)寫作部分茫然不知所措,就連我們所擅長(zhǎng)的數(shù)學(xué)也甚是擔(dān)憂,相信這其中的原因還是由于考生在新gre數(shù)學(xué)復(fù)習(xí)時(shí)沒有把基礎(chǔ)打牢。如果新版gre數(shù)學(xué)基本考點(diǎn)都沒有復(fù)習(xí)到,如何能拿到分?jǐn)?shù)呢?所以說(shuō),想要新版gre數(shù)學(xué)考好,復(fù)習(xí)的時(shí)候一定要把基本概念和重要考點(diǎn)都弄扎實(shí)。
今天針對(duì)新版gre數(shù)學(xué)復(fù)習(xí),小編給大家整理的是關(guān)于Substitution的相關(guān)內(nèi)容,這些概念在考試中一定會(huì)考到的。希望考生能再接再厲,取得一個(gè)好成績(jī),突破新版gre數(shù)學(xué)難的困境。
Substitution
Substitution is a method where one or more variables in an expression is replaced by numbers or another set of variables.To evaluate an expression specific numbers are used as substitute. To express in terms of another set of variables, variables are replaced by the new set of variables.
Example:
If x=3, then 2x2+4x+1 can be evaluated by substituting 3 for x.
Replacing all x by 3, we get 232+43+1=31.
If x=2+y, then x2-3 can be expressed in terms of y by replacing all x by :2-3=y2+4y+1.
Remember:
Do not forget to replace all occurrences of the variable.
After substitution the variable does not appear anywhere in the expression.
由于美國(guó)數(shù)學(xué)基礎(chǔ)教育的難度增加導(dǎo)致數(shù)學(xué)考試越來(lái)越難,但新gre數(shù)學(xué)復(fù)習(xí)考點(diǎn)都是高中時(shí)候?qū)W到的知識(shí)點(diǎn),考生不要過(guò)于緊張,把基本概念弄明白,再記住一些新版gre數(shù)學(xué)必備的詞匯,那么相信新版gre數(shù)學(xué)應(yīng)該沒有問(wèn)題。
2023新gre考試實(shí)施以來(lái),不僅對(duì)寫作部分茫然不知所措,就連我們所擅長(zhǎng)的數(shù)學(xué)也甚是擔(dān)憂,相信這其中的原因還是由于考生在新gre數(shù)學(xué)復(fù)習(xí)時(shí)沒有把基礎(chǔ)打牢。如果新版gre數(shù)學(xué)基本考點(diǎn)都沒有復(fù)習(xí)到,如何能拿到分?jǐn)?shù)呢?所以說(shuō),想要新版gre數(shù)學(xué)考好,復(fù)習(xí)的時(shí)候一定要把基本概念和重要考點(diǎn)都弄扎實(shí)。
今天針對(duì)新版gre數(shù)學(xué)復(fù)習(xí),小編給大家整理的是關(guān)于Substitution的相關(guān)內(nèi)容,這些概念在考試中一定會(huì)考到的。希望考生能再接再厲,取得一個(gè)好成績(jī),突破新版gre數(shù)學(xué)難的困境。
Substitution
Substitution is a method where one or more variables in an expression is replaced by numbers or another set of variables.To evaluate an expression specific numbers are used as substitute. To express in terms of another set of variables, variables are replaced by the new set of variables.
Example:
If x=3, then 2x2+4x+1 can be evaluated by substituting 3 for x.
Replacing all x by 3, we get 232+43+1=31.
If x=2+y, then x2-3 can be expressed in terms of y by replacing all x by :2-3=y2+4y+1.
Remember:
Do not forget to replace all occurrences of the variable.
After substitution the variable does not appear anywhere in the expression.
由于美國(guó)數(shù)學(xué)基礎(chǔ)教育的難度增加導(dǎo)致數(shù)學(xué)考試越來(lái)越難,但新gre數(shù)學(xué)復(fù)習(xí)考點(diǎn)都是高中時(shí)候?qū)W到的知識(shí)點(diǎn),考生不要過(guò)于緊張,把基本概念弄明白,再記住一些新版gre數(shù)學(xué)必備的詞匯,那么相信新版gre數(shù)學(xué)應(yīng)該沒有問(wèn)題。