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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35

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

26

Find the interval in which is increasing or decreasing ?