Tolong di jawab ya kakak mohon bantuannya... (pake cara spy saya mengerti ) mohon baget di jawab soalnya bsk kumpul... please jawab ya kakak kakak Thankyou.

4).

f(x) = x+ 1
f (-(x+2)) = f (-x -2)
-( x + 2) + 1 = -x - 2 + 1
- x - 2 + 1 = -x - 1
- x - 1 = - x - 1. (Ya, sama)

5).

f(x) = f(2x+1)
4x-5 = 4.(2x+1)-5
4x-5 = 8x+4-5
4x-5 = 8x-1
-5+1 = 8x-4x
-4 = 4x
x = -4:4
x = -1