Question

B3 = 25; q = –0,5. Знайдіть b1

Answer 1

Ответ:

100

Объяснение:

Решение в приложении

Answer 2

Ответ:ь1= ь3/q^2 или ь1=25/0,25=100.

Объяснение:

Answer 3

It looks like you're working with a geometric sequence where the third term $B3$ is 25 and the common ratio $q$ is -0.5. You want to find the first term $B1$.

The formula for the $n$-th term of a geometric sequence is given by:

$B_n = B_1 \times q^{(n-1)}$

Given that $B_3 = 25$ and $q = -0.5$, you can plug in these values to the formula:

$25 = B_1 \times (-0.5)^{(3-1)}$

Simplifying:

$25 = B_1 \times (-0.5)^2$ $25 = B_1 \times 0.25$

Now, solve for $B_1$:

$B_1 = \frac{25}{0.25}$ $B_1 = 100$

So, the first term $B_1$ of the geometric sequence is 100.