27. In a certain number sequence, each element after the 1st element is the result of multiplying the previous element by 3 and adding 2 to that product. The 3rd element in the sequence is 53. What is the 1st element?
Your Answer is
Correct Answer is B
Explanation
u2=(53-2)÷3=17, u1=(17-2)÷3=5, so choose B