Fill in the blank
the explains why a x b = b and a + b = b + a.
the answers could be: absolute value, associative property, commutative property, distribution property, integers, and rational number

Use the function nest to evaluate p(x) = 1 + x + · · · + x50 at x = 1.00001. (use the matlab ones command to save typing.) find the error of the computation by comparing with the equivalent expression q(x) = (x51 − 1)/(x − 1).

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Find the pattern and use it to list the nth term in the sequence. 6, 12, 20, 30, 42, 56, the nth term of the sequence is