Question

find the first four terms of a=-4 and d =-5
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Answer 1

First four term of a=16

First four term of d=20

Answer 2

a = -4

d = -5

n = 4

an = a + (n - 1)d

= (-4) + (4 - 1)(-5)

= -4 + (3)(-5)

= -4 - 15

= -19

hence, -19 is the 4 term of an AP.

hope it helps ☺️