Class 11

Math

JEE Main Questions

Binomial Theorem

Find the 5th term from the end in the expansion of $(3x−x_{2}1 )_{10}˙$

Connecting you to a tutor in 60 seconds.

Get answers to your doubts.

The value of $2×._{n}C_{1}+2_{3}×._{n}C_{3}+2_{5}+….$ is

Find the coefficient of $x_{n}$ in the expansion of $(1−9x+20x_{2})_{−1}˙$

The value of $r=0∑3 ._{8}C_{r}(._{5}C_{r+1}−._{4}C_{r})$ is \displaystyle\text{_____}.

If in the expansion of $(a−2b)_{n}$, the sum of $5_{th}$ and $6_{th}$ terms is 0, then th e values of $a/b$=

The coefficient of $x_{7}$ in the expansion of $(1−x−x_{2}+x_{3})_{6}$ is

Find the degree of the polynomial $4x+1 1 {(21+4x+1 )_{7}−(21+4x+1 )_{7}}$

Prove that $k=0∑n (−1)_{k}.._{3n}C_{k}=(−1)_{n}.._{3n−1}C_{n}$

The value of $r=0∑20 (−1)_{r}r+2._{50}C_{r} $ is equal to