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Find the partial sum.
-Find the sum of the first three terms of the sequence whose general term is given by .
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Q272: <span class="ql-formula" data-value="\frac { 1 } {
Q280: <span class="ql-formula" data-value="-21 \leq-3 x-3<-9"><span class="katex"><span class="katex-mathml"><math
Q322: -4.7 + x = 24.9<br>A) 19.7<br>B) 29.1<br>C)