book Maths Puzzle Numerical Ability

1.Solve each inequality. State the solution set using interval notation and graph the solution set. Is this possible in this day and age! How do I graph these inequalities.

a.

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** whenever n is used with V, T - it is a subscript**

Question

Let V be a finite dimensional inner product space. A
sequence Vn of vectors in V is said to converge to a
vec The problem I'm having trouble with is

If x = –1 and y = 2, what is the value of the expression 2x3(thats cubed) – 3xy ?

I understand how to substiture the numbers in, but