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secondary 2 | Maths
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Anthea Teo
Anthea Teo

secondary 2 chevron_right Maths chevron_right Singapore

Can anyone help me with question (c)? I need the answers asap plz thanks so muchhh

Date Posted: 2 months ago
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Eric Nicholas K
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Formula for sum of numbers from 1 to n is 0.5n(n+1)

Formula for sum of numbers from 1 to n-1 is 0.5(n-1)(n-1+1).