題目：求余數(shù),當(dāng)正整數(shù)n除以正整數(shù)k,且k>1.
條件1:n=(k+1)^3 【我不確定你這里是三次方還是括號(hào)乘以3,不過(guò)我估計(jì)是三次方】
條件2:k=5
既然你說(shuō)答案是A了,即條件1單獨(dú)成立,那么這里就直接看條件2好了.
條件2即是當(dāng)僅知道k=5的時(shí)候,不知道n的具體數(shù)值時(shí),余數(shù)無(wú)法確定.
回頭看條件1,當(dāng)n=(k+1)^3,結(jié)合題目已知條件k>1,用最簡(jiǎn)單的代入法,可知:
k=2時(shí),n=(2+1)^3=27,此時(shí)余數(shù)為27/2=13+1; k=3時(shí),n=(3+1)^3=64,此時(shí)余數(shù)為64/3=21+1.
我這里就不列舉了.僅僅列舉兩個(gè)便可發(fā)現(xiàn)此時(shí)余數(shù)無(wú)論如何都是固定的,為1.
因此當(dāng)條件1單獨(dú)成立時(shí),此題選A.
GMAT一道數(shù)學(xué)題 What is型提問(wèn)要唯一解么?
GMAT一道數(shù)學(xué)題 What is型提問(wèn)要唯一解么?
What is the remainder when the positive integer n is divided by the positive integer k,where k >
(1) n = (k+1)3
(2) k = 5
Statement (1) ALONE is sufficient,but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient,but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient,but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
為什么
What is the remainder when the positive integer n is divided by the positive integer k,where k >
(1) n = (k+1)3
(2) k = 5
Statement (1) ALONE is sufficient,but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient,but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient,but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
為什么
其他人氣：185 ℃時(shí)間：2020-02-04 09:51:15
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