lg根号下45等于

问题描述:

lg根号下45等于

1.65321251378

0.826606
#include
#include
int main()
{
printf("%lf\n",log10(sqrt(45.0)));
}

lg√45
=lg3√5
=lg3+lg√5
=lg3+(1/2)lg5
=0.4771+(1/2)×0.69897
=0.4771+0.3495
=0.8266