Question

Знайти перший член геометричної прогресії, якщо b5= -64, q=-2.СРОЧНО!!!!

Answer 1

Ответ:

решение смотри на фотографии

Answer 2

I can help you with your math question. To find the first term of a geometric progression, you need to use the formula: $$b_n=b_1q^{n-1}$$ where $b_n$ is the n-th term, $b_1$ is the first term, and $q$ is the common ratio. You have $b_5=-64$ and $q=-2$. Substitute these values into the formula: $$-64=b_1(-2)^{5-1}$$ Simplify the equation: $$-64=b_1(-2)^4$$ $$-64=b_116$$ Divide both sides by 16: $$-4=b_1$$ Therefore, the first term of the geometric progression is -4. You can check your answer by using the same formula to find the fifth term: $$b_5=(-4)(-2)^{5-1}$$ $$b_5=(-4)16$$ $$b_5=-64$$ This matches the given value, so the answer is correct. I hope this helps you understand how to solve this problem. If you need more help, you can find some similar examples online. Have a nice day!