Calculate (2×5×6×4)^20: Solving a Complex Power Expression

To solve the problem, we need to evaluate the expression $\left(2 \times 5 \times 6 \times 4\right)^{20}$.

Step 1: Calculate the product inside the parenthesis:

$2 \times 5 \times 6 \times 4$.

Breaking it down, we have:

• $2 \times 5 = 10$.
• $6 \times 4 = 24$.
• Therefore, the product is $10 \times 24$.

Step 2: Apply the power of a product rule:

$(10 \times 24)^{20}$ can be rewritten using the power of a product rule:

$10^{20} \times 24^{20}$.

Step 3: Compare with the given choices:

• Choice 2: $10^{20} \times 24^{20}$ matches the calculation directly.
• Choice 3: $240^{20}$ matches $(10 \times 24)^{20}$ if calculated directly without breaking into components.

Therefore, both expressions in options Choice 2 and Choice 3 are equivalent to the given expression $(2 \times 5 \times 6 \times 4)^{20}$.

Thus, the correct choice according to the problem is: B+C are correct.