Question 1:
Find the formula of the n-th term of an arithmetic progression
:
Question 2:
In the arithmetic progression (
):
. Is
a term of this progression? If yes, find its number.
Question 3:
Find the initial term of the arithmetic sequence (
), if
.
Question 4:
What is the number of the first positive term of an arithmetic sequence (
): …?
Question 5:
Find the first negative term of an arithmetic sequence (
):
.
Question 6:
Find the fourth term of an arithmetic progression (
) if
.
Question 7:
The formula of an arithmetic progression (
) is . Find the sum of the first twenty terms of this progression.
Question 8:
Find the sum of first fifteen terms of an arithmetic sequence (
), if
.
Question 9:
How many times (
) a clock would stroke during a day if it strokes only integer amount of hours from
to
?
Question 10:
Find the sum of all two-digit numbers that are multiples of
.