kingkos
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kingkos
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\[\sum_{i=1}^{27}3i\]

TuringTest
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\[\sum_{i=1}^ni=\frac{n(n+1)}2\]

kingkos
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how about 3? what is 3

chandhuru
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i think u can use the formula dw:1349188013144:dw

kingkos
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ahhh

myininaya
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3 is a constant multiple. You can bring it outside the summation.

kingkos
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i will try it now guys ok w8

myininaya
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\[\sum_{x}^{}cf(x)=c \sum_{x}^{}f(x)\]