wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

The number of integral values of a for which the function f(x)={x3+1,x0a25a+7+xx>0
has maxima at x=0 are

A
\N
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
infinite
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A \N
If f(x) has a maxima at x=0, then

f(0+h)f(0)f(0h)f(0)}

limh0h3+1111
limh0 (a25a+7+h)1
a25a+71
a25a+60
(a2)(a3)0
2a3

For a=2, limh0+ (1+h) which is greater than 1.
a2
For a=3, limh0+ (1+h) which is greater than 1.
a3

Hence, there is no integral values of x for which the given function can have a maxima at x=0.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Extrema
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon