Mathematics, 16.07.2019 06:00 netflixacc0107
Find the sum of a finite arithmetic sequence from n=1 to n=18, using the expression 4n-10a. 56b. 116c. 504d. 1,016
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![\sum_1^{18}4k=4\sum_1^{18}k=4[18(1+18)/2]=4*9*19=684](/tpl/images/0095/2635/ea57c.png)
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Find the sum of a finite arithmetic sequence from n=1 to n=18, using the expression 4n-10a. 56b. 116...
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