Question

A magician gives Jack the seed of a magic bean plant. He plants the seed and records the plant's increase in height in decimeters (dm) every day. He finds that the plant's growth follows an interesting mathematical pattern:

On day 1 the plant's height INCREASES by 1 dm.
On day 2 the plant's height INCREASES by 2 dm.
On day 3 the plant's height INCREASES by 3 dm.
On day 4 the plant's height INCREASES by 4 dm.
... and so on.

Based on this pattern, the HEIGHT of the plant at the END of the nth day will be


  Option A n dm
Option B n^2 dm
Option C n(n+1)
Option D 10dm


Please answer with explanation ​

Answer 1

Answer:

Option A) n dm