Question

Write a rule of the nth term of the sequence: 2,20,50,92,...

Answer 1

9514 1404 393

Answer:

  d  an = 6n^2 -4

Step-by-step explanation:

You only need to look at the values of the expressions for n=1 to determine the correct formula.

For n=1, the formula values are ...

• a: 4 +6 = 10
• b: 4 -6 = -2
• c: 6 +4 = 10
• d: 6 -4 = 2 . . . . . . the correct first term

The rule for the sequence is ...

  $a_n=6n^2-4$