Question

1,3,5 are the first three terms of the first differences of a quadratic sequence the 7th term of the quadratic sequence is 35 determine the 6th and 5th term of the quadratic sequence​

Answer 1

DISCLAIMERS:

1) Different teachers/schools/countries use

different symbols/formulas/names. For a few examples, what in USA is usually called arithmetic sequence is an arithmetic progression, or an AP in other places, and "trapezoid" and "billion" also change meaning as you move from one place to another.

2) Your teacher may have given you formulas and "recipes" to solve

"problems of this type" , and may even have a certain preferred or required homework format. I cook from scratch, and solve problems the same way, without using memorized formulas or procedures, only remembering formulas that I have used too often, and seem obvious to me from the most basic definitions.