WhatsAppJoin our WhatsApp Community
logo

CAT 2019 Progression — Previous Year Question

Year

CAT 2019

Section

Quantitative

Topic

Progression

Difficulty

Hard

Question

Slot-1

If a1,a2,…a_1, a_2, \ldots are in Arithmetic Progression (A.P.), then the value of the expression

1a1+a2+1a2+a3+⋯+1an+an+1\dfrac{1}{\sqrt{a_1} + \sqrt{a_2}} + \dfrac{1}{\sqrt{a_2} + \sqrt{a_3}} + \cdots + \dfrac{1}{\sqrt{a_n} + \sqrt{a_{n+1}}}
is equal to:

n / (√a₁ + √aₙ₊₁)

n−1a1+an\frac{n - 1}{\sqrt{a_1} + \sqrt{a_n}}

na1−an+1\frac{n}{\sqrt{a_1} - \sqrt{a_{n+1}}}

n−1a1+an−1\frac{n - 1}{\sqrt{a_1} + \sqrt{a_{n-1}}}

More from this topic

See all Progression PYQs →

Transform Your Interview Performance!

Learn proven strategies and techniques from successful IIM alumni to excel in your MBA interview rounds.

Explore Interview Platform
Practice all 611 Progression questionsFree, with worked solutions.

Loading...