7.Binomial Theorem
easy

${(x + a)^n}$ ના વિસ્તરણમાં ${x^{n - r}}{a^r}$ અને ${x^r}{a^{n - r}}$ પદોના સહગુણકનો ગુણોતર મેળવો.

A

$x:a$

B

$n:r$

C

$x:n$

D

એકપણ નહીં.

Solution

(d) Ratio of coefficient of ${x^{n – r}}{a^r} $ and ${x^r}{a^{n – r}}$ is

$= \frac{{^n{C_r}}}{{^n{C_{n – r}}}} = \frac{{^n{C_r}}}{{^n{C_r}}} = \frac{1}{1}$

Standard 11
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.