We are given three problems to solve. 1) Identify which of the four given terms, $\frac{1}{\sqrt{3}}$, $\frac{1}{(\sqrt{3})^2}$, $\frac{1}{(\sqrt{3})^3}$, $\frac{1}{(\sqrt{3})^4}$, are irrational. 2) Write $y^{-1}$, $y^0$, $y^2$ and $y^3$ in increasing order of size when $y < -2$. 3) Given that $-3 < x \le 3\frac{1}{3}$, (a) find the largest integer value of $x$, (b) find the smallest prime number value of $x$.

AlgebraIrrational NumbersExponentsInequalitiesInteger PropertiesPrime Numbers
2025/3/12

1. Problem Description

We are given three problems to solve.
1) Identify which of the four given terms, 13\frac{1}{\sqrt{3}}, 1(3)2\frac{1}{(\sqrt{3})^2}, 1(3)3\frac{1}{(\sqrt{3})^3}, 1(3)4\frac{1}{(\sqrt{3})^4}, are irrational.
2) Write y1y^{-1}, y0y^0, y2y^2 and y3y^3 in increasing order of size when y<2y < -2.
3) Given that 3<x313-3 < x \le 3\frac{1}{3},
(a) find the largest integer value of xx,
(b) find the smallest prime number value of xx.

2. Solution Steps

1) A number is irrational if it cannot be expressed as a ratio of two integers.
13\frac{1}{\sqrt{3}} is irrational because 3\sqrt{3} is irrational.
1(3)2=13\frac{1}{(\sqrt{3})^2} = \frac{1}{3}, which is rational.
1(3)3=133\frac{1}{(\sqrt{3})^3} = \frac{1}{3\sqrt{3}}, which is irrational.
1(3)4=19\frac{1}{(\sqrt{3})^4} = \frac{1}{9}, which is rational.
Therefore, the irrational terms are 13\frac{1}{\sqrt{3}} and 1(3)3\frac{1}{(\sqrt{3})^3}.
2) Let's analyze the given terms for y<2y < -2. Let's pick y=3y=-3 as an example.
y1=1y=13=13y^{-1} = \frac{1}{y} = \frac{1}{-3} = -\frac{1}{3}
y0=1y^0 = 1
y2=(3)2=9y^2 = (-3)^2 = 9
y3=(3)3=27y^3 = (-3)^3 = -27
In increasing order, we have y3<y1<y0<y2y^3 < y^{-1} < y^0 < y^2.
Therefore, the terms in increasing order are y3,y1,y0,y2y^3, y^{-1}, y^0, y^2.
3)
(a) The given inequality is 3<x313-3 < x \le 3\frac{1}{3}, which is 3<x103-3 < x \le \frac{10}{3}.
Since 103=3.333...\frac{10}{3} = 3.333..., the largest integer value of xx is

3. (b) We want to find the smallest prime number value of $x$, such that $-3 < x \le \frac{10}{3}$.

Prime numbers are numbers greater than 1 that have only two factors: 1 and themselves.
The prime numbers greater than 3-3 are 22 and 33.
Both 22 and 33 satisfy the inequality 3<x103-3 < x \le \frac{10}{3}.
Therefore, the smallest prime number is
2.

3. Final Answer

1) 13\frac{1}{\sqrt{3}}, 1(3)3\frac{1}{(\sqrt{3})^3}
2) y3,y1,y0,y2y^3, y^{-1}, y^0, y^2
3) (a) 3
(b) 2

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