13. What is the sum of 5-14 2410z+21 3x2+14x-10 (2+7)(z-2)(z+3) O 32-14r-10 (z+3)(z+5)(z+2) » " #-3, x# -5, z #-2 3x+14x+10 (z+3)(2+5)(z+2) » T-3, x# -5, at-2 3x-14x+10 (z+3)(2+5)(z+2) » "-3, x -5, a #-2
13. What is the sum of 5-14 2410z+21 3x2+14x-10 (2+7)(z-2)(z+3) O 32-14r-10 (z+3)(z+5)(z+2) » " #-3, x# -5, z #-2 3x+14x+10 (z+3)(2+5)(z+2) » T-3, x# -5, at-2 3x-14x+10 (z+3)(2+5)(z+2) » "-3, x -5, a #-2
Chapter9: Sequences, Probability And Counting Theory
Section9.4: Series And Their Notations
Problem 50SE: The sum of terms 50k2 from k=x through 7 is 115. What is x?
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