7.Binomial Theorem
hard

माना सभी $x \in R$ के लिये $( x +10)^{50}+( x -10)^{50}$ $=a_{0}+a_{1} x+a_{2} x^{2}+\ldots . .+a_{50} x^{50}$, तो $\frac{a_{2}}{a_{0}}$ बराबर है

A

$12.50$

B

$12$

C

$12.25$

D

$12.75$

(JEE MAIN-2019)

Solution

$(10+x)^{50}+(10-x)^{50}$

$a_{0}=\left(10^{50}\right)(2)$

$a_{2}=^{50} C_{2}(10)^{48}(2)$

$\frac{a_{2}}{a_{0}}=\frac{^{50} C_{2}(10)^{48}(2)}{10^{52}(2)}=12.25$

Standard 11
Mathematics

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