Question

If f(x) =bx - 7 and f(-1) = 4, then b = ______.

विकल्प

• 11

• -3

• -11

• 3

Answer 1

If f(x) =bx - 7 and f(-1) = 4, then b = -11.

Explanation:

f(x) = bx - 7

⇒ f(-1) = b(- 1) - 7 = - b - 7

f(- 1) = 4

⇒ 4 = - b - 7

⇒ b = - 11