faladetemiloluwa362 faladetemiloluwa362 15-05-2024 Mathematics Answered A sequence of number U1, U2, U3 satisfies the relation(3n-7) Un+1=(3n+1) Un for all positive integers if U1 find a.U3 and U4, b. An expression for the nth term Un, c. The sum of the first n term of the sequence