7.Binomial Theorem
easy

$^{15}C_0^2{ - ^{15}}C_1^2{ + ^{15}}C_2^2 - ....{ - ^{15}}C_{15}^2$ का मान है

A

$15$

B

$-15$

C

$0$

D

$51$

Solution

चूंकि हम जानते हैं कि

$^n{C_0} – {\,^n}C_1^2 + {\,^n}C_2^2 – {\,^n}C_3^2 + … + {( – 1)^n}.{\,^n}C_n^2 = 0$,

(यदि $n$ विषम है)

एवं प्रश्नों में $n=15$ (विषम)दिया है

Standard 11
Mathematics

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