Prove by mathematical induction that, for all positive integers n, (5r+ +-2) = {n}(n+1)?(2n+1).
r=1

throw the computer

step-by-step explanation:

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.

17.08

correct me if i am wrong.