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What is the N formula of ▽ f(x)=x^2+x
Where h=1? Why s parameters measured from -10 db in antenna design ? A club has 4 members,the position of president and vice-president have to be filled.In how many different ways can the 2 positions be filled? What will be the calculation process of electric cable size in RM unit based on distance & load?????? Is every person atoms reused?