Find the sum of the first n terms of the harmonic series where n is an integer variable greater than one

Can (2,3 and square root 10) be sides ona right triangle?

Atriangle has verticals at b(-3,0), c(2,-1), d(-1,2). which transformation would produce an image with verticals b”(-2,1), c”(3,2), d”(0,-1)?

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?