Answer:

Step-by-step explanation:
Given:
The given AP is.
12,0,-12,......

The first term of an AP 
Common difference 
We use the the formula for nth term of an AP.
for 87th term





Therefore, The 87th term of given series is -1020.
Answer:
40
Step-by-step explanation:
C is not a linear function
Answer:
4- 4Step-by-step explanation: