help@askiitians.com

+91-87964 74404

Most Scoring Topics in IIT JEE

if the constant term of the binomial expansion is (2x -1/x)^n is -160 then what is the value of n?

vedant wasnik

13 Years agoGrade

1 Answer

Sher Mohammad

12 Years ago

kth term of the expansion is

nCk 2^k*x^k*(-1)^n-k*x^k-nconstant term so k=n-k =>k=n/2

now nCn/2 2^n/2=160 and n/2 must be odd

for n=6 the equation holds.

Sher Mohammad

faculty askiitians

scoring chapters from inter 1^st year in iit to get atleast below 2000 raks

most scoring topics in iit jee

2 Answers Available

Last Activity: 5 Years ago

iam a very average student...and i want to crack jee mains 2021...in this last 7days figure me out on which easy topics i should focus for better score

most scoring topics in iit jee

2 Answers Available

Last Activity: 5 Years ago

Two parallel beams of light P and Q are incident normally on a prism and the transmitted rays are brought to focus with the help of a convergent lens as shown. If the intensities of the upper and lower beams immediately after transmission from face AC are 4I abd I, respectively, find the resultant intensity at the focus.

most scoring topics in iit jee

1 Answer Available

Last Activity: 5 Years ago

Tell me the most scoring chapters in maths and chemistry..... And some hacks to solve mcq also...

most scoring topics in iit jee

0 Answer Available

Last Activity: 5 Years ago

The system of connected flexible cables shown in the figure is supporting 2 loads of 550N and 600N at points B and D. Determine the tensions in various segments of the cable

most scoring topics in iit jee

1 Answer Available

Last Activity: 5 Years ago

View all Questions