Question

Найти первый отрицальный член прогрессий. 10.5;9.8;9.1...​

Answer 1

Ответ:

-0,7

Объяснение:

aₙ=a₁+d(n-1)   a₁=10,5   a₂=9,8  a₃=9,7   d=a₂-a₁=9,8-10,5=-0,7

aₙ=10,5-0,7(n-1)  aₙ<0

10,5-0,7(n-1)<0

10,5-0,7n+0,7<0

-0,7n<-11,2

n>16   a₁₇=10,5-0,7·16=10,5-11,2=-0,7

Answer 2

Finding the First Negative Term in a Progression

To find the first negative term in the given progression 10.5; 9.8; 9.1..., we can observe the pattern of the progression to identify the first negative term.

The given progression is a decreasing arithmetic progression, where each term is obtained by subtracting a constant value from the previous term. In this case, the common difference between each term is -0.7.

Using this information, we can calculate the first negative term in the progression:

10.5 - 0.7 = 9.8 9.8 - 0.7 = 9.1 9.1 - 0.7 = 8.4

Therefore, the first negative term in the given progression is 8.4.