Question

某廠原來(lái)月產(chǎn)量為a,一月份增產(chǎn)10%,二月份比一月份減產(chǎn)10%,設(shè)二月份產(chǎn)量為b,則(    )

A.a=b                                          B.a＞b

C.a＜b                                          D.無(wú)法比較a、b的大小

Answer 1

B

解析：∵b=a(1+10%)(1-10%),

∴b=a［1-(10%)²］=a(1-).

∴b=a×.

∴a＞b.