Question

Determine 27ℎ

term of an AP whose 9

ℎ

term is -10 and common difference is5/4
​

Answer 1

Answer:

Arrow keys One cell in the direction of the arrow

Tab One cell to the right

Shift+Tab One cell to the left

Ctrl+arrow key To the edge of the current data region (the first or last cell that isn’t empty) in the direction of the arrow

End To the cell in the lower-right corner of the window*

Ctrl+End To the last cell in the worksheet, in the lowest used row of the rightmost used column

Home To the beginning of the row containing the active cell

Ctrl+Home To the beginning of the worksheet (cell A1)

Page Down One screen down

Alt+Page Down One screen to the right

Ctrl+Page Down To the next sheet in the workbook

Page Up One screen up

Alt+Page Up One screen to the left

Ctrl+Page Up To the previous sheet in the workbook

Answer 2

Answer:

$an = a + (n - 1)d$

$a9 = a + (9 - 1)d$

$- 10 = a + (8) \frac{5}{4}$

$- 10 = a + 10$

$- 10 - 10 = a$

$- 20 = a$

$a = - 20$

$a27 = a + (n - 1)d$

$a27 = - 20 + (27 - 1) \frac{5}{4}$

$a27 = - 20 + (26) \frac{5}{4}$

$a27 = - 20 + \frac{65}{2}$

$a27 = \frac{ - 40 + 65}{2}$

$a27 = 25$

So, 27th term of the AP is 25.