If f 1 4 5 6 6 1 and gx 5x 5 find f5 g5 Given fx 5x 3
If f = {(1, -4), (5, 6), (6, 1)} and g(x) = 5x + 5, find f(5) + g(5) Given f(x) = 5x + 3 and g(x) = x^2 + 5x - 7 find (f-g)(x)
Solution
1. f= {(1,-4),(5,6),(6,1)} and g(x)= 5x+5
f(5)=6 and g(5)=5(5)+5 =30
Therefore f(5)+g(5)=36
Correct option is B
2. f(x)=5x+3 and g(x)=x2+5x-7
(f*g)(x) = (5x+3)(x2+5x-7) = 5x3+25x2-35x +3x2+15x-21=5x3+28x2-20x-21
Correct option is A
