=>1+1/2+1/3........+1/1318 +1/1319 -2(1/2+1/4......1/1318) =>1/660 +1/661........+1/1318+/1319 =>(1/660+1/1319) +(1/661+1/1318).......combine other terms like this... =>(1979/660x1319)+(1979/661x1318).................. as number of terms are even all will combine.....like above in pairs... and and and 1979is prime....... so proved .........
If you can fill the unforgiving minute
With sixty seconds' worth of distance run,
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!
Moderation Team
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