, 14.05.2020snow01

# Find the 20th term of the arithmetic sequence 17, 13, 9

The 20th term in the arithmetic sequence is -59.

17,13,9,5,1,-3,-7,-11,-15,-19,-23,-27,-31,-35,-39,-43,-47,-51,-55,-59

I hope my answers are correct.

13,14,15,16,17,18,19

Step-by-step explanation:

Start from 13 until you reach the number 19

-59

Step-by-step explanation:

9-4 =5        5-4=1      1-4= -3        -3-4=-7     -7-4=-11        -11-4=-15         -15-4=-19

-19-4=-23        -23-4=-27          -27-4=-31      -31-4=-35      -35-4=-39   -39-4=-43

-43 -4=-47      -47-4=-51           -51-4=-55       -55-4=-59

A20= -59

Step-by-step explanation:

Aⁿ= A¹ + (n-1) d

A20=17+(20-1)-4

=17+(19)-4

=17-76

A20= -59

9=17+(20-1)d

9=17+19d

17-9=19d

8 = 19d

19 19d (cancel 19)

0.42=d

Am i correct?

85

Step-by-step explanation:

9,13,17,21,25,28,33,37,41,45,49,53,57,61,65,69,73,77,81,85

-59

Step-by-step explanation:

Step-by-step explanation:

an=a1+(n-1)d

a20=17+(20-1)-4

a20=17+(-76)

a20=-59

an=a1+(n-1)d

a20=17+(20-1)-4

a20=17+(-76)

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