Question Number 148482 by mathdanisur last updated on 28/Jul/21

Commented byhknkrc46 last updated on 28/Jul/21

★ (1/(78)) + (2/(79)) + (3/(80)) − 3 = ((1/(78)) − 1) + ((2/(79)) − 1) + ((3/(80)) − 1) = ((−77)/(78)) + ((−77)/(79)) + ((−77)/(80)) = −77((1/(78)) + (1/(79)) + (1/(80))) ★ ((−77((1/(78)) + (1/(79)) + (1/(80))))/((1/(78)) + (1/(79)) + (1/(80)))) = −77

Commented bymathdanisur last updated on 28/Jul/21

Thank you Ser