Question

For the function $f(x)=x^4(12/nx-7)$ match the following :

Column I		Column II
A	If $(a,b)$ is the point of inflection then $a-b$ is equal to	p	3
B	If $e^t$ is a point of minima then $12t$ is equal to	q	1
C	If graph is concave downward in $(d,e)$ then $d+3e$ is equal to	r	4
D	If graph is concave upward in $(p,\infty )$ then the least value of $p$ is equal to	s	8

• A. $(A)\to (s),(B)\to (r),(C)\to (p),(D)\to (q)$
• B. $(A)\to (p),(B)\to (q),(C)\to (r),(D)\to (s)$
• C. $(A)\to (s),(B)\to (r),(C)\to (p),(D)\to (p)$
• D. $(A)\to (r),(B)\to (p),(C)\to (p),(D)\to (q)$

Answer 1

Answer: (A)

Correct answer is (a) $(A)\to (s),(B)\to (r),(C)\to (p),(D)\to (q)$