sum of 1 to n natural number is 36 then find the value of n
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n/2(2a+(n-1)d)=sum
by using this formula
putting a=1and d=1 u can get a quadratic equation and solve u will get n= 8 equation will be n square+n-72=0
by using this formula
putting a=1and d=1 u can get a quadratic equation and solve u will get n= 8 equation will be n square+n-72=0
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