Question

What is the value of S4 for

Answer 1

C

Explanation:

Answer 2

90

Explanation:

To find s4 we find sum of values when n=1,n=2,n=3,n=4

given expression is
`6(2)^(n-1)`

n=1 , plug in 1 for n

`6(2)^(1-1)=6`

n=2

`6(2)^(2-1)=12`

n=3

`6(2)^(3-1)=24`

n=4

`6(2)^(4-1)=48`

Sum of all 4 terms = 6+12+24+48=90