Answer: -287
Step-by-step explanation:
The given pattern: 9, 1, -7, -15, ….
We observe that ,
First term : a=9
Common difference between the terms= 1-9=-8
For Arithmetic sequence , the formula to find the nth term is given by :-

Then, 38th term will be :-

Hence, the 38th term of the sequence.= -287
I think it would be 77p... It might not be but i think it is
So it would be x^7•y^6
If you need the explanation or you need me to show you the steps then message me.
Hope it helps :)