Question

a Use the shortcut to find the sum.
l 1+ 2+ 3+ 4+ 5+ 6+ 7 + 8
ini 1 + 2 + 3 + ... + 14 + 15 + 16​

Answer 1

Answer:

To display the current keyboard shortcuts:

Select Tools > Options from the menu bar. The Options dialog box is displayed.

Display the current keyboard shortcuts by selecting one of these options from the navigation tree:

Select Keyboard Shortcuts to display keyboard shortcuts for all available actions for all views.

Ctrl + A -- Select all contents of the page.Ctrl + B -- Bold highlighted selection.Ctrl + C -- Copy selected text.Ctrl + X -- Cut selected text.Ctrl + N -- Open new/blank document.Ctrl + O -- Open options.Ctrl + P -- Open the print window.Ctrl + F -- Open find box.

Answer 2

Answer:

n(n+1)/2

1. 8(8+1)/2

(8×9)/2

72/2

36