The number of bacteria in a certain culture doubles every hour. If there were 30 bacteria present in the culture originally, how many bacteria will be present at the end of 2nd hour, 4th hour and nth hour?

Answer

N/a

Explanation

Here `a=30,r=2`
G.P. `=a,ar,ar^(2),ar^(3),…..`
No. of bectaria at the end of two hours. = 3rd term
`=ar^(2)=30(2)^(2)=120`
No. of bacteria at the end of 4th hour= 5th term
`=a*r^(4)=30(2)^(4)=480`
No. of bacteria at the end of nth hour =(n+1)th term
`=a*r^(n)=30*(2)^(n)`