Help with Series question. (1 Viewer)

[Metho NoX]

Hello need some help with this questioin. Not sure how to do it.

A seedling of 8cm grows 3/5 of its height each week. How tall will it grow.

Its a sum to infinity question, answer is 20cm.

 

[Huy]

a = 8

r = 3/5 or 0.6

S(infinity) = a / (1 - r)

= 8 / (1 - 0.6)
= 8 / 0.4
= 20 cm

 

[crazylilmonkee]

a=8cm
r=0.6
sum of infinity = 8/(1-0.6)
=20

 

[crazylilmonkee]

grr... beat me by 1 min

 

[Metho NoX]

Alright, thanks all.