Find AC, given that line AD is the perpendicular bisector of BC

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position

Use the ratio test to determine whether ∑n=14∞n+2n! converges or diverges. (a) find the ratio of successive terms. write your answer as a fully simplified fraction. for n≥14, limn→∞∣∣∣an+1an∣∣∣=limn→∞.