ngl thats quite scary
Explanation:
Let x assume two values xβ and xβ. Substituting these values in (1) and subtracting one from the other
f(xβ) - f(xβ) = 6xβ + 1 - (6xβ + 1) = 6xβ - 6xβ= 6(xβ - xβ) β¦β¦β¦β¦β¦β¦β¦..(A)
Equation (A) can be used to evaluate the difference between values of f(x) for any preassigned values of x.
In the present problem, xβ= 1 and xβ = 2.
β΄ (A) gives,
f(2) - f(1) = 6(2β1) = 6 . 1 = 6 (Answer).