Question

Find 17th term of series(A.P.)20,18,16,14.....

Answer 1

Answer:

by use formula an=a+(n-1)×d

Explanation:

a17=20+(17-1)×(-2)

a17=20+(16)×(-2)

a17= 20-32

a17= -12

17th term of AP is -12

Answer 2

Answer:

a17 = -12

Explanation:

AP : a1 , a2 , a3 ...... an

Common Difference (d) = a2 - a1

an = a + (n - 1)d

Here ,

AP : 20 , 18 , 16 , 14 ....

Common Difference (d) = a2 - a1

Common Difference (d) = 18 - 20

Common Difference (d) = -2

an = a + (n - 1)d

a17 = 20 + (17 - 1) -2

a17 = 20 + ( 16 X -2)

a17 = 20 + (-32)

a17 = 20 - 32

a17 = -12

HOPE IT HELPS YOU !

THANKS !