Question

If the function f(x) = {(1, x ≤ 2), (ax + b, 2 < x < 4), (7, x ≥ 4) is continuous at x = 2 and 4, then the values ofa and b are­ 

(A) 3, 5 

(B) 3, -5 

(C) 0, 3 

(D) 0, 5

Answer 1

Answer is (B) 3, -5

Since f(x) is continuous at x = 2