zwb的回答:所求极限函数 =cosx/2cosx/2^2....cosx/2^n*sinx/2^n =cosx/2cosx/2^2....cosx/2^(n-1)sinx/2^(n-1)/2 =cosx/2cosx/2^2....cosx/2^(n-2)sinx/2^(n-2)/2^2 =... =(sin2x)/2^n 故原函数极限为0
zwb的回答:所求极限函数 =cosx/2cosx/2^2....cosx/2^n*sinx/2^n =cosx/2cosx/2^2....cosx/2^(n-1)sinx/2^(n-1)/2 =cosx/2cosx/2^2....cosx/2^(n-2)sinx/2^(n-2)/2^2 =... =(sin2x)/2^n 故原函数极限为0
|