Question

find the aum of first eleven terms whose first term is 16 and d = - 5​

Answer 1

Step-by-step explanation:

term n= 11

a = 16

d = -5

Sn = n/2 [ 2a + ( n - 1) x d ]

= 11/2 [ 2 x 16 + ( 11-1 ) x -5]

= 11/2 [ 32 + 10 x -5 ]

= 5.5 [ 32 -50 )

= 5.5 - 18

= - 12.5

Answer 2

Step-by-step explanation:

good

hello

hello

hello

yes yo