Question

5
47. If f satisfies the relation
f(x+y)+f(x - y)=2
f(x).f(y) x,y eR and
f(0) = 0; then f(10)-f(-10) =
1) 0 2) 1 3) 2
4)3​

Answer 1

Answer:

answer is 34 hope it helps bye bye