Question

find the 17th term of ap 20 18 16 14​

Answer 1

16 is the correct Answer________

Answer 2

AP = 20-18-16-14

T1 =(a) = 20

t2- 18

t3 - 16

t4 - 14

common difference - t2-t1. t3-t2= 16-18 = -2

18-20

d = -2

therefore common difference is 2

now,

Tn = a+(n-1)×d

t17 = 20 + (17 - 1)× - 2

= 20+18× - 2

= 20+ (- 36)

= - 16

the 17th term of an ap is - 16.

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