Examples with solutions for Multiplication of Powers: Identify the greater value

Exercise #1

Which value is greater?

Video Solution

Step-by-Step Solution

To solve this problem, we need to simplify and compare the given expressions.

Let's simplify each:

  • y7×y2 y^7 \times y^2 :
    Using the product of powers rule, y7×y2=y7+2=y9 y^7 \times y^2 = y^{7+2} = y^9 .
  • (y4)3 (y^4)^3 :
    Using the power of a power rule, (y4)3=y4×3=y12 (y^4)^3 = y^{4 \times 3} = y^{12} .
  • y9 y^9 :
    This is already in its simplest form, y9 y^9 .
  • y11y4 \frac{y^{11}}{y^4} :
    Using the power of a quotient rule, y11y4=y114=y7 \frac{y^{11}}{y^4} = y^{11-4} = y^7 .

Now that all the expressions are in the form yn y^n , we can compare the exponents to see which is greatest: y9y^9, y12y^{12}, y9y^9, and y7y^7.

The expression with the highest power is y12 y^{12} , which corresponds to the choice (y4)3 (y^4)^3 .

Thus, the greater value among the choices is (y4)3 (y^4)^3 .

Answer

(y4)3 (y^4)^3

Exercise #2

Which value is greater?

Video Solution

Step-by-Step Solution

To determine which value is greater, let's simplify each choice:

Choice 1: (a2)4 (a^2)^4
By using the power of a power rule: (xm)n=xm×n (x^m)^n = x^{m \times n} , it simplifies to:
(a2)4=a2×4=a8 (a^2)^4 = a^{2 \times 4} = a^8 .

Choice 2: a2+a0 a^2 + a^0
Evaluate using the zero exponent rule, a0=1 a^0 = 1 :
This expression becomes a2+1 a^2 + 1 .

Choice 3: a2×a1 a^2 \times a^1
Apply the product of powers rule: xm×xn=xm+n x^m \times x^n = x^{m+n} :
This simplifies to a2+1=a3 a^{2+1} = a^3 .

Choice 4: a14a9 \frac{a^{14}}{a^9}
Apply the quotient of powers rule: xmxn=xmn \frac{x^m}{x^n} = x^{m-n} :
This simplifies to a149=a5 a^{14-9} = a^5 .

Now, let's compare these simplified forms:
We have a8 a^8 , a2+1 a^2 + 1 , a3 a^3 , and a5 a^5 .

For a>1 a > 1 , exponential functions grow rapidly, thus:
- a8 a^8 is greater than a5 a^5 .
- a8 a^8 is greater than a3 a^3 .
- a8 a^8 is greater than a2+1 a^2 + 1 for sufficiently large aa.

Thus, the expression with the highest power, and therefore the greatest value, is (a2)4 (a^2)^4 .

Answer

(a2)4 (a^2)^4

Exercise #3

Which value is greater?

Video Solution

Step-by-Step Solution

To determine which of the given expressions is the greatest, we will use the relevant exponent rules to simplify each one:

  • Simplify y7×y2 y^7 \times y^2 :
    Using the Product of Powers rule, we have y7×y2=y7+2=y9 y^7 \times y^2 = y^{7+2} = y^9 .
  • Simplify (y4)3 (y^4)^3 :
    Using the Power of a Power rule, we have (y4)3=y4×3=y12 (y^4)^3 = y^{4 \times 3} = y^{12} .
  • Simplify y9 y^9 :
    This expression is already simplified and is y9 y^9 .
  • Simplify y11y4 \frac{y^{11}}{y^4} :
    Using the Division of Powers rule, we have y11y4=y114=y7 \frac{y^{11}}{y^4} = y^{11-4} = y^7 .

After simplifying, we compare the powers of y y from each expression:

  • y9 y^9 from y7×y2 y^7 \times y^2
  • y12 y^{12} from (y4)3 (y^4)^3
  • y9 y^9 from y9 y^9
  • y7 y^7 from y11y4 \frac{y^{11}}{y^4}

Clearly, y12 y^{12} is the largest power among the expressions, meaning that (y4)3 (y^4)^3 is the greatest value.

Therefore, the correct choice is (y4)3 (y^4)^3 .

Answer

(y4)3 (y^4)^3

Exercise #4

Which value is greater?

Video Solution

Step-by-Step Solution

To determine which expression has the greatest value, we apply the exponent rules to simplify each choice:

  • For x3×x4 x^3 \times x^4 , using the product rule: x3×x4=x3+4=x7 x^3 \times x^4 = x^{3+4} = x^7 .
  • For (x3)5 (x^3)^5 , using the power of a power rule: (x3)5=x3×5=x15 (x^3)^5 = x^{3 \times 5} = x^{15} .
  • x10 x^{10} is already in its simplest form.
  • For x9x2 \frac{x^9}{x^2} , using the quotient rule: x9x2=x92=x7 \frac{x^9}{x^2} = x^{9-2} = x^7 .

To identify the greater value, we compare the exponents:

  • x7 x^7 from choices 1 and 4.
  • x15 x^{15} from choice 2.
  • x10 x^{10} from choice 3.

The expression with the largest exponent is (x3)5 (x^3)^5 or x15 x^{15} .

Therefore, the expression with the greatest value is (x3)5(x^3)^5.

Answer

(x3)5 (x^3)^5

Exercise #5

Insert the compatible sign:

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23×24×2822×23×210 2^3\times2^4\times2^8\Box2^2\times2^3\times2^{10}

Video Solution

Answer

=

Exercise #6

Insert the compatible sign:

>,<,=

35×317×3732×31×3 3^{-5}\times3^{17}\times3^{-7}\Box3^2\times3^1\times3

Video Solution

Answer

<

Exercise #7

Mark the appropriate sign:

32+1010  23+520:5 3^2+\sqrt{10}\cdot\sqrt{10}\text{ }_{\textcolor{red}{—}\text{ }}2^3+\sqrt{5}\cdot\sqrt{20}:5

Video Solution

Answer

>

Exercise #8

222324 — 232225 2^2\cdot2^{-3}\cdot2^4\text{ }_{—\text{ }}2^3\cdot2^{-2}\cdot2^5

Video Solution

Answer

<

Exercise #9

Which expression has a greater value given that x>1 ?

Video Solution

Answer

x2×x9 x^2\times x^9

Exercise #10

Which expression has the greater value given that c>1 ?

Video Solution

Answer

(c)4×c1 (c)^4\times c^1

Exercise #11

Which expression has the greater value given that b>1 ?

Video Solution

Answer

b7×b4 b^7\times b^4

Exercise #12

727873(7)4——727973(7)4 \frac{7^2\cdot7^{-8}}{7^3\cdot(-7)^4}_{——}\frac{7^2\cdot7^{-9}}{7^3\cdot(-7)^4}

Video Solution

Answer

>

Exercise #13

Which expression has the greater value given that a>1 and b>1 ?

Video Solution

Answer

a7×b6 a^7\times b^6