Question

In a flower bed there are 43 rose plants and the first now 41 in the second 39 in the third and so on there are 11 rose dance in the last row how many rows are there in the flower bed

Answer 1

Step-by-step explanation:

required A.P

= 43, 41, 39 .......... 11

here a = 43 i.e first term

and this A.P have a common difference of -2

so use the formula to find the nth term

11 = 43 + ( n-1 )(-2)

11 = 43 + ( n-1 )(-2) 32/2 = n-1

11 = 43 + ( n-1 )(-2) 32/2 = n-1 16+1= n

11 = 43 + ( n-1 )(-2) 32/2 = n-1 16+1= n 17 = n

so the no. of row is 17

hope this will help you☺️

and please follow me as I am new here