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Q22: <span class="ql-formula" data-value="\sum _ { n =
Q119: <span class="ql-formula" data-value="( 1 + \sqrt {
Q126: <span class="ql-formula" data-value="a _ { n }
Q136: <span class="ql-formula" data-value="\sum _ { n =
Q175: Find the sum of the series
Q222: (u × v) ·v = u ·(u
Q284: <span class="ql-formula" data-value="x = \frac { 2
Q329: A company adopts an advertising campaign to
Q340: <span class="ql-formula" data-value="r = 5 \cos \theta
Q356: <span class="ql-formula" data-value="x=2 \sin t, y=5 \cos