Question

In a flower bed there are 23 rose plants in a first row 21 second 19 in third there are 5 rose plants in last how many rows are there in flower bed

Answer 1

Answer:

so answer is 15

Step-by-step explanation:

in this ap a=23, n=5 d=-2

Nth term=a+(n-1)d

23+(5-1)-2=15

hope it will help you

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Answer 2

Answer:

10

Step-by-step explanation:

first term=23

n=?

d=-2

Tn=5

Tn=a+(n-1)×d

5=23+2-2n

-2n=-20

n=10

Hence,there 10 flower beds

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