(a) if f(x) = 2x+4, g(x) = 2x(power 2) - 9?

raja-y

then show that fog(x) and gof(x) are not identity functions.

(b) find the 1 1th term of the sequence

1+i,2,2(1 -i),... where i(power 2) = -1

michael

algebra 2 sux

bskelkar

obviously inverse of f is (x - 4)/2. which not g(x). so fog and gof can't be identity functions.

its a G.P with c.r. (1-i) so 11th terms is (1+i)[(1-i)^10]

Note that (1+i)(1-i) =2.