Question

Tell the answer fast!!!!!!! ​

Answer 1

Good question,

Here is your perfect answer!

Height in first year (a)= 1m,

Here d = - 5cm

a n = 0

=) a n = a + (n-1)d

=) 0 = 100cm + (n-1)*-5

=) - 100 / - 5 = (n-1)

=) 20 = n-1

=) 20+1 = n

=) 21 = n,

After 21 years, it will have ceased growing.

Answer 2

Answer:

21 years

Step-by-step explanation:

A tree grows 5 cm less each year .

The tree also grows 1 m tall in the first year .

Then in how many years it will cease growing ?

Imagine this as an A.P .

a = 1 m = 100 cm

d = - 5 cm

n th term = 0

a + ( n - 1 ) d = 0

= > 100 + ( n - 1 ) ( - 5 ) = 0

= > 100 - 5 n + 5 = 0

= > 5 n = 100 + 5

= > 5 n = 105

= > n = 105/5

= > n = 21

The number of years is 21.