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' =

                                       =

                                       =

                                       =

                                       =

easy its decreasing

step-by-step explanation:

because its top point is at the to of the graph on the left side (atleast from the veiw i see it) now if that top point wast in the lower part of the graph it would be increasing hope this have a nice day