Intermediate Algebra (11th edition)

7.6 39.Concept Check In which one of the following does yvary inversely as x? A. B. C. D. Solve each problem. 40.For the subject ...

CHAPTER 7 Test 423 Solve each problem. 59.The strength of a contact lens is given in units called diopters and also in millimete ...

Add or subtract as indicated. 10. 11. Simplify each complex fraction. 12. 13. 14. 15.Identify each of the following as a ...

CHAPTERS 1–7 Cumulative Review Exercises 425 1.Evaluate for and Solve each equation or inequality. Solve each prob ...

25.For the polynomial functions defined by and find (a) , (b) (c) and (d) Factor each polynomial completely. 29.Solv ...

The Pythagorean theorem states that in any right triangle with perpendicular sides aand band longest side c, It is used in surve ...

428 CHAPTER 8 Roots, Radicals, and Root Functions OBJECTIVES OBJECTIVE 1 Find roots of numbers. Recall that We say that 6 square ...

If nis even, the two nth roots of aare often written together as with read “positive or negative,” or “plus or minus.”   n 2 a ...

FIGURE 2shows the graph of the cube root function.Since any real number (pos- itive, negative, or 0) can be used for xin the cub ...

OBJECTIVE 4 Find nth roots of nth powers. Consider the expression. At first glance, you may think that it is equivalent to a. Ho ...

OBJECTIVE 5 Use a calculator to find roots. While numbers such as and are rational, radicals are often irrational numbers. To fi ...

I 1. 2. 3. 4. 5. 6. II A. 3 B. C. 2 D. E. - 5 F. Not a real number - 3 - 2 2481 238 23 - 27 25 - 32 - 225 2 - 25 SECTION 8.1 Rad ...

Refer to the rectangle to answer the questions in Exercises 83 and 84. 83.Which one of the following is the best estimate of its ...

90.Use Heron’s formula from Exercise 89to find the area of a triangle with sides of lengths 91.The coefficient of self-induction ...

436 CHAPTER 8 Roots, Radicals, and Root Functions Evaluating Exponentials of the Form Evaluate each exponential. (a) (b) (c) (d) ...

(d) Notice in part (c) that we first evaluate the exponential and then find its negative. In part (d), the -sign is part of the ...

We obtain an alternative definition of by using the power rule for exponents differently than in the earlier definition. If all ...

In parts (g) – (i), write each radical as an exponential. Simplify. Assume that all vari- ables represent positive real numbers. ...

(d) Power rule Power rule Quotient rule = Definition of negative exponent y38/9 x^4 = x-^4 y38/9 4 - A- 92 B=^369 + 92 =^389 = x ...

(b) Quotient rule 3 2 - 2 3 = 9 6 - 4 6 = 5 = x 6 5/6 = x3/2-2/3 = x3/2 x2/3 2 x^3 23 x^2 SECTION 8.2 Rational Exponents 441 Con ...