Question

下列变量在给定变化过程中是无穷小量的有( )． A.2－x－1(x→0) B.(x→0) C.(x→＋∞) D.(x→0)

A.B.X2-1/X-1 C.sinX/X D.sin(1/X ) E.X2（3-sin(1/X)）/X+1

Answer 1

【答案】： style='WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FLOAT: none; COLOR: rgb(51,51,51); FONT: 14px/28px zuoyeFont_mathFont, 'Microsoft Yahei', 宋体, sans-serif; WIDOWS: 1; DISPLAY: inline !important; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,238); TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px'>A：等价于X+1；B：等于1；C：有界量；D：等价于X^2 所以选D.