Is the least positive integer for which the function is increasing in

MATHEMATICS · Subjective · AP · Calculus AB · Analytical Applications of Differentiation · Analytical Applications of Differentiation

Problem

k

is the least positive integer for which the function

f(x)=(2x+1)^{50}(3x-4)^{60}

is increasing in

[k, \infty)

. The value of

k