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DD_QD (MuPAT) >> DD_QD (MuPAT) > DD: 16 bytes decimal arithmetics > ddnrt

ddnrt

n-th root of a DD real number

Syntax

r = ddnrt(a,n)

Parameters

a

DD number

n

integer > 0

r

DD number

Description

ddnrt(a,n)

return a n-th root of a.

Examples

a = ddrand(1,1)*100
r = ddnrt(a,3)
(r*r*r-a).hi
--> a = ddrand(1,1)*100
 a  = 
   6.561381467862602087669074544900E1

--> r = ddnrt(a,3)
 r  = 
   4.033342437368291873928469084975E0

--> (r*r*r-a).hi
 ans  =
  -7.889D-31

See Also

Authors

Copyright (C) 2011 - Tsubasa Saito

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