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trapecia [35]
2 years ago
5

Determine the explicit equation for the arithmetic sequence given below.-3,-7,-11,-15,-19

Mathematics
2 answers:
liraira [26]2 years ago
7 0

Answer:

-3 + (n-1)(-4)

Step-by-step explanation:

We follow the formula.

a1 + (n-1)d

d is the common difference.

Rama09 [41]2 years ago
7 0

Answer:

-4n + 1

Step-by-step explanation:

-3, - 7, -11 , -15 ,-19 ,.........

a_{1} = -3\\\\

Common difference (d) = 2nd term - first term

                                  d = -7 -(-3)

                                     = -7 + 3

                                 d = -4

a_{n} =a + (n-1)d\\\\a_{n} = -3 + (n - 1)(-4)

    = -3 + n *(-4) - 1*(-4)

   = -3 - 4n + 4

  = -4n + 1

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