Summation notation $$\sum_{i=1}^8 a_i$$ Expands to $a_1 + a_2 +... + a_8$ $$\sum_{i=5}^8 a_i$$ Expands to $a_5 + a_6 +... + a_8$ $$\sum_{i=1}^8 a_ib_ix^i$$Expands to ...
MS Office Excel is a spreadsheet application. In Excel, various kinds of statistical functions can be applied to the cells. One can also apply mathematical functions to the data. The below article ...
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