Question: sequence of plot in same curve


dear all 
I need to plot many curves on the same  figure. 
for j from 1 to 6 do 
pf[i]:=plot(f, x = a[i]..a[i+1]);
end do 
How change the following line so that I can plot many curves like 20 or more, using sequence or someting similar
display(pf[1], pf[2],pf[3],pf[4],pf[5],pf[6]})

many thinks


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