Question

let an=na n-2,with a1=1and a2=2.then a4a3 equals
A.12
B.24
C.2
D.7

Answer 1

\[a_n=na_{n-2}\] with \[a_1=1,a_2=2\]?

Answer 2

thats correct i just couldnt type it like that

Answer 3

that is my guess in any case
first you need \(a_3\) which is \[3\times a_{3-2}=3\times a_1=3\times 1=3\]

Answer 4

ok

Answer 5

then you need \(a_4\) which is
\[4\times a_{4-2}=4a_2=4\times 2=8\]

Answer 6

ok , can u help me solve the rest

Answer 7

what is left to do?

Answer 8

im confused

Answer 9

you were asked for \(a_3\times a_4\) right?

Answer 10

yes

Answer 11

we found \(a_3=3,a_4=8\) all that is left for you is to multiply

Answer 12

so it would be 3x8=24

Answer 13

@satellite73 can u help me with absolute value