RD Sharma - Mathematics (Volume 1)

Book: RD Sharma - Mathematics (Volume 1)

Chapter: 17. Increasing and Decreasing Functions

Subject: Maths - Class 12th

Q. No. 35 of Exercise 17.2

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Find the value(s) of a for which f(x) = – ax is an increasing function on R ?

We have,

f(x) = – ax

Given that f(x) is on increasing function

for all x R

for all x R

a < for all x R

But the last value of 3x2 = 0 for x = 0

a 0

Chapter Exercises

More Exercise Questions


Find the interval in which is increasing or decreasing ?