47. find the error in the "proof" of the following "theorem." "theorem": let r be a relation on a set a that is symmet- ric and transitive. then r is reflexive. "proof": let a e a. take an element be a such that (a, b) e r. because r is symmetric, we also have (b, a) e r. now using the transitive property, we can conclude that (a, a) e r because (a, b) e r and (b, a) e r.

answer: idk

step-by-step explanation:

answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.