- \(\frac{c}{b}\)
- \(\frac{c}{a}\)
- \(\frac{-b}{c}\)
- \(\frac{b}{c}\)
- None of these

Option 4 : \(\frac{b}{c}\)

Free

RBI Grade B 2020: Full Mock Test

9431

200 Questions
200 Marks
120 Mins

**Given:**

α and β are two roots of the quadratic equation ax2 - bx + c = 0

**Concept used: **

For equation ax2 - bx + c = 0

Sum of roots (α + β) = -(b/a)

Product of roots (α × β) = c/a

**Calculations:**

Sum of roots (α + β) = -(-b/a) = b/a

Product of roots (α × β) = c/a

Now,

(1/α) + (1/β) = (α + β)/(αβ)

⇒ (b/a)/(c/a)

⇒ b/c

**∴ Option 4 will be the correct answer**

India’s **#1 Learning** Platform

Start Complete Exam Preparation

Daily Live MasterClasses

Practice Question Bank

Mock Tests & Quizzes

Trusted by 2,20,07,304+ Students

Start your FREE coaching now >>

Testbook Edu Solutions Pvt. Ltd.

1st & 2nd Floor, Zion Building,

Plot No. 273, Sector 10, Kharghar,

Navi Mumbai - 410210

[email protected]
Plot No. 273, Sector 10, Kharghar,

Navi Mumbai - 410210

Toll Free:1800 833 0800

Office Hours: 10 AM to 7 PM (all 7 days)