For question b, how is the answer is ㏒ₐ2 + 4(n-1)㏒ₐ3?
Please help me.

Step-by-step explanation:

nth term of an A.P. is given by the explicit formula,

Here, 'a' = First term

n = number of term

d = common difference

For an A.P. given as,

First term 'a' of the given A.P. =

Common difference 'd' =

                                       =

                                       =

                                       =

                                       =

the answer is 200

step-by-step explanation:

the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.

the simple interest for 2 years is $264; the simple interest for 1 year is $132.

$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.

the value of $200 at 22% interest compounded annually for three years is

200%281.22%29%5e3

the amount of interest is that value, minus the original $200.