Question

A^-2+a^-4/a^3+a^5 если a=-2

Answer 1

Вот. вроде так. @@@@@@@@@@@@@

Answer 2

To simplify the expression, let's first substitute the value of 'a' into the expression:

a = -2

Now, the expression becomes:

((-2)^-2 + (-2)^-4) / ((-2)^3 + (-2)^5)

Next, we calculate the values of each term:

(-2)^-2 = 1 / (-2)^2 = 1 / 4 (-2)^-4 = 1 / (-2)^4 = 1 / 16 (-2)^3 = -2 * -2 * -2 = -8 (-2)^5 = -2 * -2 * -2 * -2 * -2 = -32

Now, let's substitute these values into the expression:

((1/4) + (1/16)) / (-8 + (-32))

Now, let's simplify further:

(1/4 + 1/16) / (-8 - 32)

Now, find a common denominator for the fractions:

(4/16 + 1/16) / (-8 - 32) (5/16) / (-40)

Now, divide the fractions:

(5/16) * (-1/40)

Now, multiply the fractions:

-5 / (16 * 40) -5 / 640

So, the simplified expression when a = -2 is -5/640.