Question

A1=-0,8 d=3 найти :a3,a7,a24

Answer 1

А3=-0,8+(3-1)*3=5,2
a7=-0,8+(7-1)*7=41,2
a24=-0,8+(24-1)*24=551,2

Answer 2

To find the values of A3, A7, and A24, we need to use the given information: A1 = -0.8 and d = 3. It seems like you're working with an arithmetic sequence, where each term is obtained by adding a constant difference (d) to the previous term.

To find A3, we can use the formula for the nth term of an arithmetic sequence:

An = A1 + (n - 1) * d

Let's substitute the given values:

A3 = A1 + (3 - 1) * d = -0.8 + 2 * 3 = -0.8 + 6 = 5.2

Therefore, A3 = 5.2.

To find A7, we'll use the same formula:

A7 = A1 + (7 - 1) * d = -0.8 + 6 * 3 = -0.8 + 18 = 17.2

Therefore, A7 = 17.2.

Finally, to find A24:

A24 = A1 + (24 - 1) * d = -0.8 + 23 * 3 = -0.8 + 69 = 68.2

Therefore, A24 = 68.2.