Properties of Triangles 2 Question 6

6. The set of all real numbers a such that a2+2a,2a+3 and a2+3a+8 are the sides of a triangle is ……

(1985,2M)

Analytical & Descriptive Questions

Show Answer

Answer:

Correct Answer: 6. p(,0)[3+22,)

Solution:

  1. Since, a2+2a,2a+3 and a2+3a+8 form sides of a triangle.

Now, a2+3a+8<(a2+2a)+(2a+3)

a2+3a+8<a2+4a+3

a>5

Also, (a2+3a+8)+(2a+3)>a2+2a

3a>11a>113

Again, (a2+3a+8)+(a2+2a)>2a+3

2a2+3a+5>0

which is always true.

Triangle is formed, if a>5



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक