Respuesta :

a) the formula is a(first term)+2(n-1) so the nth term is 29+2(n-1) and the 50th term is: 29+2(50-1)=29+2(49)=127
b) the formula is a(first term)-1(n-1) so the nth term is 118-(n-1) which is 118-n+1 and its simplest form is 119-n so the 50th term is gonna be like this: 119-50=69

Answer:

[A]

29, 27, 25, 23, 21.......

term #1 = 31-2 = 29

term #2 = 31-4 = 27

term #3 = 31-6 = 25

term #4 = 31-8 = 23

term #5 = 31-10 = 21

...

tern #n = 31-2nStep-by-step explanation:

[B]

The answer to this question is very simple 120.

You can even do it systematically.

Take a=114, d = a2 - a1 = 116 - 114 =2

So now you get, a1= 114, d = 2

Now you want the 4th term so,

a4 = a + (n-1)d

a4 = 114 + 3 (2)

a4 = 114 +6 = 120

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