Functions

​Functions

By juhaina alabri

Multiple Choice

Given that k(x)=2x+3 and t(x)=x2, then calculate (t∘k)

• 4x2−12x+9
  

•   2x2−3
  

• 4x2+12x+9

• 2x2+3

Multiple Choice

Given that f(x)=2x−3 and g(x)=x+34, then calculate (g∘f)?

• 
  x/2

• 
  (x-3)/2

• (x+2)/3

•   x/4

Multiple Choice

Given that f(x)=2x−3 and g(x)=x+34, then calculate f(g(2))?

• 1/2

• 1

• -1

• -1/2

Multiple Choice

For a given two functions: f(x)=−2x+1 and g(x)=7x2+5x−4, then f(x)−g(x) becomes

 

• -5x³-3x²+13x-4
  

• 5x³+10x²-8x-4

• -7x²-7x+5

• 7x²+3x-3

Multiple Choice

For a given two functions: f(x)=−2x+1 and g(x)=7x2+5x−4, then f(x)+g(x) becomes

• -14x³-3x²+13x-4

• 7x²+3x-3

• -5x²+7x+3

• 14x³+10x²-8x-4