Find the sum of the first 39 terms of the following series, to the nearest integer. 2 , 7 , 12 , . . .
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we know the x-intercept of the line is 1, recall that an x-intercept is when the graph intercepts or touches the x-axis, and when that happens, y = 0, so the point is really x = 1, y = 0, namely (1,0). We also know another point on the line, is (-2, 9).