BPSC 48th to 52nd Exam Prelims 2008 Solved Paper

© examsiri.com

Question : 35 of 150

Marks: +1, -0

For every integer x the expression

x(x^2 – 1) (3x + 2)

is divisible by

13
15
24
25

Solution:

Expression

p(x)=

x(x^{2}-1)(3 x+2)

Putting

x=1

p(x)=0

After putting

x=2

We get

p(x)=48

putting

x=3

p(x)=3(9-1)(3 × 3+2)=24 × 11

Hence, for every integer

x

, the expression

p(x)

is divisible by 24

© examsiri.com

Go to Question:

Prev Question

Next Question