Shayna, Jamal, and Anjali are finding the 2nd differences for the sequence with the formula ^a n=^n 2−3.
Shayna says the 2nd differences are a constant value of 5.
Jamal says the 2nd differences are a constant value of 7.
Anjali says the 2nd differences are a constant value of 2.
Is Shayna, Jamal, or Anjali correct in finding the 2nd differences?
1. Anjali is correct. Jamal and Shayna both calculated 1st differences.
2. Shayna is correct. Jamal used the wrong terms, and Anjali subtracted too many times.
3. Anjali is correct because the polynomial is a degree of 2.
4. Jamal is correct. Shayna calculated based on the wrong terms, and Anjali subtracted too many times.