book Maths Puzzle Numerical Ability

I have a problem 3x^0+(3x)^0. I am having a hard time figuring this problem out. Your help would greatly be appreicated.

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book Other Question

The first 4 terms of an arithmetic sequence are 187, 173, 159, and 145.
a. Give an explicit formula for this sequence.
b. Give a recursive formula for this sequence.


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Thanks Earlsdon. It really helped me out alot. I now need help with this problem. Thanks.
What are the next two terms of the sequence 32, -48, 72, -108, . . . ?