hy how can i do :
d/f#
g/b
thank you....

i dont know how to type up code to show u exactly where to put ur fingers but ill tell u the first one is a
D chord with a F# note as a bass.
EADGBE ------
2X0232 <- each number is the fret.
where u put ur finger

the second,
G chord with a B note in the bass.

EADGBE
------
X10034

i know the spacing is gonna mess up sorry if u cant understand ill repost.

There is a program called chordwizard that allows you to input chord names and it will show you multiple fingerings in whichever tuning you desire. It also allows you to input fingerings and it will tell you a few of the possible names for the chord you made up.

You can also play the standard fingering for a D chord, and use your thumb for the F#. Or, you can barre at the second fret, fingering as if it was a C chord, whereby the first finger crosses all the strings at the second fret including the F#.