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OpenStudy (anonymous):
Use Gauss's approach not formula to find the sum of 26+27+28+.......+175
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OpenStudy (skullpatrol):
Any ideas what "Gauss's approach" was?
OpenStudy (amoodarya):
a=26 + 27 + 28 +.......+175 a=175+174+173 + ...+26 sum of them then you have 2a so divide by 2
OpenStudy (amoodarya):
2a=150*(26+175)
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