Assume the US has an economic boom, so the US has a higher growth rate that other nations.?

Question

What will happen to the exchange rate of the US dollar?

Answer 1

All other things being equal, that would tend to strengthen the dollar, if for no other reason than that a growing economy means more transactions, more goods and services being produced, thus more demand for the dollar.   Additionally there is the likely increase in global demand mentioned above.

Answer 2

will go up a lot since everybody will want to invest into US.