The sum of S of the first N. positive integers is s=1/2n (n+1). a) Plot four points (n, s) that satisfy the equation . is the equation a linear equation? explain your reasoning?
B) Does the value n=4.2 make sense in the context of the problem explain your reasoning.

b

step-by-step explanation:

1010: 3030

is it i think

it’s the first one your welcome

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function