Evaluate (3×5×7)/(4×8×10) Raised to the Fifth Power

Question

Insert the corresponding expression:

(3×5×74×8×10)5= \left(\frac{3\times5\times7}{4\times8\times10}\right)^5=

Video Solution

Solution Steps

00:00 Simplify the following problem
00:04 According to the laws of exponents, a fraction raised to the power (N)
00:09 equals the numerator and denominator raised to the same power (N)
00:16 Note that both numerator and denominator are products
00:22 We will apply this formula to our exercise
00:36 According to the laws of exponents when a product is raised to the power (N)
00:42 it is equal to each factor in the product separately raised to the same power (N)
00:47 We will apply this formula to our exercise
01:11 This is the solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the expression (3×5×74×8×10)5\left(\frac{3 \times 5 \times 7}{4 \times 8 \times 10}\right)^5.

  • Step 2: Apply the rule for powers of fractions to simplify the expression.

  • Step 3: Simplify the products and raise each factor to the power of 5.

Now, let's work through each step:
Step 1: The expression given is (3×5×74×8×10)5\left(\frac{3 \times 5 \times 7}{4 \times 8 \times 10}\right)^5.
Step 2: According to the power of a fraction rule, (ab)n=anbn\left(\frac{a}{b}\right)^n = \frac{a^n}{b^n}, we can distribute the power of 5 to both the numerator and denominator:

(3×5×74×8×10)5=(3×5×7)5(4×8×10)5 \left(\frac{3 \times 5 \times 7}{4 \times 8 \times 10}\right)^5 = \frac{(3 \times 5 \times 7)^5}{(4 \times 8 \times 10)^5}

Step 3: Now apply the power to each factor:

=35×55×7545×85×105 = \frac{3^5 \times 5^5 \times 7^5}{4^5 \times 8^5 \times 10^5}

This matches the expression in choice 2. Therefore, the correct corresponding expression is 35×55×7545×85×105\frac{3^5 \times 5^5 \times 7^5}{4^5 \times 8^5 \times 10^5} and also (3×5×7)5(4×8×10)5 \frac{(3 \times 5 \times 7)^5}{(4 \times 8 \times 10)^5} .

Therefore, the solution to the problem is A+B.

Answer

a'+b' are correct