Question

i need someone to check my answers

Answer 1

@Vocaloid

Answer 2

@Hero

Answer 3

a1 = 5
a2 = a1 + 5(-1)^2 = 5 + 5 = 10
a3 = a2 + 5(-1)^3 = 10 + (-5) = 5
a4 = a3 + 5(-1)^4 = 5 + 5 = 10
The terms bounce from 5 to 10 repeating this pattern forever.
If n is even, then a_n = 10; otherwise, if n is odd, then a_n = 5

Therefore, the answer is choice B) 5
since n = 343 is odd