我認為是選B (1)的式子只給了D(t)的值 而這個式子無法求得滿足該式的r和t的值 題目規(guī)定只有r的值是定量 因為年利率不變 不能算出r的話 便不能貿(mào)然帶入題目中給的t=3 不能確定值的話便不充足
而(2)已經(jīng)給定了定量r的值 直接便可帶入原式r和t的值 便可求出題目所需答案 即確定值13310
還有你那個t應該是平方吧 打錯了 以上
GMAT一道數(shù)學題
GMAT一道數(shù)學題
$10,000 is deposited in a certain account that pays r percent annual interest compounded annually,the amount D(t),in dollars,that the deposit will grow to in t years is given by D(t) = 10,000 {1+(r/100)}t.What amount will the deposit grow to in 3 years?
(1) D(t) = 11,000
(2) r =10
A.Statement (1) ALONE is sufficient,but statement (2) alone is not sufficient.
B.Statement (2) ALONE is sufficient,but statement (1) alone is not sufficient.
C.BOTH statements TOGETHER are sufficient,but NEITHER statement ALONE is sufficient.
D.EACH statement ALONE is sufficient.
E.Statements (1) and (2) TOGETHER are NOT sufficient.
$10,000 is deposited in a certain account that pays r percent annual interest compounded annually,the amount D(t),in dollars,that the deposit will grow to in t years is given by D(t) = 10,000 {1+(r/100)}t.What amount will the deposit grow to in 3 years?
(1) D(t) = 11,000
(2) r =10
A.Statement (1) ALONE is sufficient,but statement (2) alone is not sufficient.
B.Statement (2) ALONE is sufficient,but statement (1) alone is not sufficient.
C.BOTH statements TOGETHER are sufficient,but NEITHER statement ALONE is sufficient.
D.EACH statement ALONE is sufficient.
E.Statements (1) and (2) TOGETHER are NOT sufficient.
英語人氣:339 ℃時間:2020-04-08 18:03:10
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