operations on function
Given :
f(x) = x2 - 4x - 21 and g(x) = x - 7;
Find : a. (f + g)(x)
b.(f-8)(x)
c.lf*g)(x)
d. (f/g)(x)
Share
operations on function
Given :
f(x) = x2 - 4x - 21 and g(x) = x - 7;
Find : a. (f + g)(x)
b.(f-8)(x)
c.lf*g)(x)
d. (f/g)(x)
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer:
a. x^2 -4x -21 +x -7
= x^2 -3x -28
b. x^2 -4x -24 -(x -7)
= x^2 -4x -24 -x +7
= x^2 -3x -17
c. (x^2 -4x -21) (x -7)
= x^3 -7x^2 -4x^2 -28x -21x +147
= x^3 -11x^2 -49x +147
d. x^2 -4x -21 / x-7
= (x-7) (x+3) / (x-7)
= x + 3