A very good try, but f(n) is still ambiguous. I assume you mean
f(n) = 1/2*n*(n+2) and not 1/[2*n*(n+2)]
Then f(n+2) - f(n) = 1/2*(n+2)*(n+2+2) - 1/2*n*(n+2)
= 1/2*(n+2)*(n+4) - 1/2*n*(n+2)
= 1/2*(n+2)*{(n + 4) - n}
= 1/2*(n+2)*4
= 2*(n+2)
Given a value of x, find the value for -3x + 2
CPUs, when given mathematical equations, apply the laws of mathematics to those equations. The equation a = a is true by the reflexive property of equality.
replace the variables with the given values and simplify using the order of operations.
It would help if the expression was given!
You are given: G(x) = x2 + x So if you want to solve G(2), all you need to do is replace all occurrences of "x" with the number 2, then work out what it comes to. G(2) = 22 + 2 ∴G(2) = 4 + 2 ∴G(2) = 6
explain how to evaluate an algebraic expression for given variables. how would we evaluate the expression "3x-4y+9" when x=2and y=5?
Take 3 and substitute into the expression given to you but not mentioned in the question here and evaluate the expression. "Sub and Solve" I say.
14
To evaluate an expression is nothing but to operate the given expression according to the operators given in the expression if it is evaluable i.e, it could be convertable.
Given a value of x, find the value for -3x + 2
-7
A variable
There is no operator given an in such cases it is often taken to be multiplication eg ab = a*b Thus 2*(-4)*(3) = -24
CPUs, when given mathematical equations, apply the laws of mathematics to those equations. The equation a = a is true by the reflexive property of equality.
replace the variables with the given values and simplify using the order of operations.
You replace each variable by its value. Then you do the indicated calculations.
It would help if the expression was given!