# Category Archives: Mathematics

# Vector & 3D Classes

Previews of all the 17 classes can be seen below.

If the system of equations 2x – y + z =0, x- 2y + z = 0 and ax – y + 2z = 0 has infinitely many solutions and f(x) is continuous function satisfying f(x)+f(x+5) = 2, then

is equal to

a) 0

b) 5

c) a

d) –2a

**Solution**