Question

Как посчитать пример 7 в степени ка + 1 - 2 *7 в степени ка дробь 5 * 7 в степени ка минус 1

Answer 1

(7^(k+1) -2*7^k)/5*7^(k-1)=7^(k-1)*(49-14)/5*7^(k-1)=35/5=7

Answer 2

Calculating 7 to the Power of -2

To calculate 7 to the power of -2, we can use the formula for negative exponents, which states that a^(-n) = 1 / (a^n). Therefore, 7 to the power of -2 can be calculated as:

7^-2 = 1 / 7^2

Let's calculate 7 to the power of -2 step by step.

Calculation

Using the formula, we have: 7^-2 = 1 / 7^2

Substituting the value of 7^2: 7^-2 = 1 / 49

So, 7 to the power of -2 is equal to 1/49.

[[SOURCE #1]]