Question

7/a+b+8/a-b-16b/a^2-b^2 при а=0,05 b=-00,4

Answer 1

Vot tak prosto reshaetsya

Answer 2

To evaluate the expression $\frac{7}{a + b} + \frac{8}{a - b} - \frac{16b}{a^2 - b^2}$ for the given values $a = 0.05$ and $b = -0.4$, you can substitute these values into the expression and calculate the result step by step.

1. Substitute $a = 0.05$ and $b = -0.4$ into the expression:

$\frac{7}{0.05 - 0.4} + \frac{8}{0.05 + 0.4} - \frac{16(-0.4)}{0.05^2 - (-0.4)^2}$

2. Calculate the values inside the fractions:

$\frac{7}{-0.35} + \frac{8}{0.45} - \frac{16(-0.4)}{0.0025 - 0.16}$

3. Simplify the fractions:

$-20 + \frac{8}{0.45} - \frac{16(-0.4)}{0.0025 - 0.16}$

4. Continue to simplify:

$-20 + \frac{8}{0.45} - \frac{16(-0.4)}{0.0025 - 0.16}$

5. Perform the calculations within the fractions:

$-20 + \frac{17.7778}{0.0025 - 0.16}$

6. Calculate the values within the parentheses:

$-20 + \frac{17.7778}{-0.1575}$

7. Divide to find the final result:

$-20 - 112.6984 \approx -132.6984$

So, for $a = 0.05$ and $b = -0.4$, the value of the expression is approximately -132.6984.