if 1+2+3+4=10 then what is the sum of 1+2+3+4+5+6+7+8+9+....................................upto 200 hundrade
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so a=1 d=1 l=200
so sum is =100(201)
20100
so sum is =100(201)
20100
wanishakir:
no it is a wrong answer
Now it is correct
formulla is n×n+1/2
yes it is right
if it was correct brainliest please
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