Question 821461
I suspect the formula you meant is
{{{Z=Z[r]/sqrt(1+4Q^2((F-F[r])/F[r])^2)}}}
With {{{Q=125}}} , {{{Z[r]=60000ohm}}} , {{{F[r]=150MHz}}} , and {{{F=142.5MHz}}} ,
{{{Z=60000ohm/sqrt(1+4*125((142.5-150)/150)^2)}}}
so {{{Z=6000ohm/sqrt(1+500(7.5/150)^2)}}}
{{{Z=60000ohm/sqrt(1+500*0.5^2)}}}
{{{Z=60000ohm/sqrt(1+500*0.0025)}}}
{{{Z=6000ohm/sqrt(1+1.25)}}}
{{{Z=60000ohm/sqrt(2.25)}}}
{{{Z=60000ohm/1.5}}}
{{{Z=40000ohm}}}
 
NOTE:
{{{(F-F[r])/F[r]}}}={{{(F-F[r])}}}{{{"/"}}}{{{F[r]}}}
When you can write is as {{{(F-F[r])/F[r]}}} , those brackets are included in the horizontal line.
Typing the formula in one line without without those brackets gives it a different meaning:
{{{F-F[r]}}}{{{"/"}}}{{{F[r]}}}={{{F-F[r])/F[r]}}}
and that is a big problem when entering calculations into a computer or calculator.