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Mathematics 10 Online
OpenStudy (anonymous):

1*2+2*3+3*4+4*5

OpenStudy (bahrom7893):

so what do we need to find?

OpenStudy (anonymous):

sum to n terms

OpenStudy (bahrom7893):

hmm starting from n = 1 right?

OpenStudy (anonymous):

k

OpenStudy (bahrom7893):

|dw:1330883002526:dw|

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