a = 3/4 and x = 3**-40

Strauss

x= 0.8225263339969959081282058400607250283965E-19 (a+x) - a= 0.8225263339969958611685571972304851389214E-19 4*(a+x) - 3*x - 3= 0.8225263339969939352386128099946320829435E-19 0.2*(a+x) + 0.8*x - 0.15= 0.8225263339969961019098002456349667709187E-19 x/(a+x)= 0.1096701778662661210717332307615448941248E-18 1 - a/(a+x)= 0.1096701778662661469213066994179955694558E-18 1/(a/x+1)= 0.1096701778662661210717332307615448941248E-18 (1-(a+0.1*x)/(a+x))/0.9= 0.1096701778662661362216958972666852630998E-18 a/(a+x)= 0.9999999999999999998903298221337338530787 1 - x/(a+x)= 0.9999999999999999998903298221337338530787 1/(1+x/a)= 0.9999999999999999998903298221337338530787 (a+x/10)/(a+x) - 0.1*x/(a+x)= 0.9999999999999999998903298221337338530787 log((a+x)/a))= 0.1096701778662660506187957060995936986397E-18 log(a+x)-log(a)= 0.1096701778662661469213066994179955694558E-18 log(1+x/a)= 0.1096701778662660506187957060995936986397E-18 -log(1-x/(a+x))= 0.1096701778662661469273204733746047874730E-18

Joplin

x= 0.8225263339969959081282058414700000000000E-19 (a+x) - a= 0.8225263339695301742316508267300000000000E-19 4*(a+x) - 3*x - 3= 0.8225263342219656639023746044618000000000E-19 0.2*(a+x) + 0.8*x - 0.15= 0.8225263339695301742316508267300000000000E-19 x/(a+x)= 0.1096701778662661210717332309496000000000E-18 1 - a/(a+x)= 0.1096701778541895069085293176396000000000E-18 1/(a/x+1)= 0.1096701778662661210717332309496000000000E-18 (1-(a+0.1*x)/(a+x))/0.9= 0.1096701778738233783273633892431000000000E-18 a/(a+x)= 0.9999999999999999998903298221458000000000 1 - x/(a+x)= 0.9999999999999999998903298221458000000000 1/(1+x/a)= 0.9999999999999999998903298221458000000000 (a+x/10)/(a+x) - 0.1*x/(a+x)= 0.9999999999999999998903298221331000000000 log((a+x)/a))= 0.1096701778794330558695879214535000000000E-18 log(a+x)-log(a)= 0.1096701778668112813920655065262000000000E-18 log(1+x/a)= 0.1096701778541895069025155436858000000000E-18 -log(1-x/(a+x))= 0.1096701778541895069145430915961000000000E-18