N217

ա) f(x) = x² (n g(x)=√x

_w) F=fog

F = (√x)² = x

D(F) = [0; +∞0)

բ) F=g of

F = √x² = |x|

D(F) == 00: + ∞0) => R

դ) F = fof

F = (x²)² = x²

D(F) = ER

N216

ա)F(x)=F(x-1)

x = 1

x in[0,1]

բ)F(x)=f(2x)

f(x) = 1/2

x in[-0,5,0]

գ) F(x) = f(- x ^ 2)

x in[-1;1]

N218

ա) x – 8x +21= x² = 8x + 16 + 5 = (x-4)² + 5 =>

x² – 8x + 21 = (x-4)² + 5

բ) 4x2x²-2=-2 (x² – 2x + 1) ==2(x – 1)² =

= (-1)²-(-2) =>

4X

2x² -2=(x-1)²-(-2)

գ) 3x² – 6x – 10 = 3x² – 6x + 3 – 1 3 = 3(x² – 2x + 1) – 13 =

= 3(x – 1)² – 13 => 3x – 6x – 10 = 3(x-1) ² – 13