判斷題
單項選擇題
A.12x B.24x C.4 D.0
A.負的正弦函數(shù) B.負的余弦函數(shù) C.正弦函數(shù) D.余弦函數(shù)
A.a B.b C.0 D.1
A.1/sinx B.1/cosx C.-tgx D.ctgx
A.cscx tgx B.secx ctgx C.-cscx ctgx D.1/cosx
A.7cos(7x+3) B.7sinx C.7cosx D.7sin(7x+3)
A.初等函數(shù)的導函數(shù)是初等函數(shù) B.連續(xù)函數(shù)一定存在原函數(shù) C.初等函數(shù)的原函數(shù)是初等函數(shù) D.非初等函數(shù)沒有原函數(shù)
A.冪函數(shù) B.它自己 C.對數(shù)函數(shù) D.三角函數(shù)
A.導數(shù)是差商的極限 B.導數(shù)是經(jīng)濟函數(shù)的邊際 C.導數(shù)是函數(shù)的微分 D.導數(shù)是函數(shù)的微分與自變量的微分之商
A.極限值不等于這點的函數(shù)值 B.左右極限都存在 C.左右極限至少有一個不存在 D.沒有定義