Question: Determine values of function

f=2*x*(int(sqrt(1+y^2*(t*x-1)^2/(1-(t*x-1)^2)), t = 0 .. 1))    ,0<x<2,   0<y<1,

I want to Determine the value of f for the various values of x,y For a domain So that x , y Changing with steps 0.1. for example:

x y f
0.1 0.1  
0.2 0.1  
0.3 0.1  
0.4 0.1  
0.5 0.1  
0.6 0.1  
0.7 0.1  
0.8 0.1  
0.9 0.1  
0.2 0.2  
0.3 0.2  
.:::
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