Question

In a flower garden, there are 23 plants in the first row, 21 plants in the second row,19 plants in
the third row and so on. If there are 10 rows in that flower garden, then find the total number
of plants in the last row with the help of the formula tn = a + (n – 1)d.

Answer 1

Answer:

tn=41

Step-by-step explanation:

it forms an ap

ap= 23,21,19..........

a=23, d=a2-a1=23-21=2,n=10

tn= a+(n-1)d

tn=23+(10-1)2

tn=23+9*2

tn=23+18

tn=41