Question

sendo p (x):ax+b, tal que p (3 ):1 e p(-5) :2 , qual a soma de A e B?

Answer 1

p(x) = ax+b
p(3) = 3a + b = 1
p(-5) = - 5a + b = 2

- 5a + b = 2   ×(-1) = 5a - b = - 2


3a + b = 1
5a - b = - 2
---------------
8a = - 1

a = - 1/8

3a + b = 1
3(-1/8) + b = 1
-3/8 + b = 1
b = 1 + 3/8
b = (8×1+3)/8
b = (8+3)/8
b = 11/8