Source: Official Guide Revised GRE 1st Ed. Part 6; Set 3; #9

2

If 1 + x + x2 + x3 then the average (arithmetic mean) of

If 1 + x + x2 + x3 then the average (arithmetic mean) of x, x2, x3 and x4 is equal to which of the following? 12x, 15x, 20x, 30x, 60x

1 Explanation

1

Gravatar Chris Lele, Magoosh Tutor

Oct 8, 2012 • Comment

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