Question

2a^-1/3/a^2/3-3a^-1/3 при а=4

Answer 1

Ответ на картинке внизу

Answer 2

To solve this expression, first, let's simplify it step by step.

Step 1: Simplify each term individually. a^(-1/3) = 1 / (a^(1/3)) = 1 / (cubic root of a) a^(2/3) = (a^(1/3))^2 = (cubic root of a)^2

Step 2: Substitute the value of 'a' (a = 4) into each term. a^(-1/3) = 1 / (4^(1/3)) = 1 / (cubic root of 4) = 1 / 2 a^(2/3) = (4^(1/3))^2 = (cubic root of 4)^2 = 2^2 = 4

Now, let's rewrite the expression using these simplified values:

2 * (1 / 2) / 4 - 3 * (1 / 2)

Step 3: Perform the arithmetic operations. 2 * (1 / 2) = 1 1 / 4 - 3 * (1 / 2) = 1 / 4 - 3 / 2 = -5 / 4

The final result is:

1 - 5/4 = 4/4 - 5/4 = -1/4

So, when a = 4, the expression evaluates to -1/4.