What are the first four terms of the sequence represented by the expression n(n – 2) – 3? a. –5, –2, 1, 4 b. –4, –3, 0, 5 c. –3, 0, 3, 6 d. –2, 0, 2, 4

ANSWER

B. –4, –3, 0, 5

EXPLANATION

The general formula for the sequence is:

To find the first term we substitute n=1

To find the second term, we substitute n=2

To find the third term,we put n=3;

To find the fourth term, we put n=4

The correct choice us B

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)  

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