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Solve the equation 73+74+75+...+1236 = 1000x
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High School Teacher
Left side of the equation is an arithmetic progression with first term a1=73 and the last term is 1236, the common difference 1 between the successive terms. There are n=1236-73+1 =1164 terms.The sum to n terms are given by,
Sn = (a1+an)n/2
Therefore the equation to solve now is
x=761738/1000 = 761.838.
Hope this helps.
Posted by neela on June 3, 2009 at 11:22 PM (Answer #1)
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