f(z)=z+a3z3+a4z4+ analytic in the unit disc and satisfying |(z2f(z)/f2(z))1|<1, and show that such functions are starlike if they satisfy |(z2f(z)/f2(z))1|<(1/2)."> 在类的单价的功能 - raybet雷竞app,雷竞技官网下载,雷电竞下载苹果

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