7.Binomial Theorem
easy

${C_0} - {C_1} + {C_2} - {C_3} + ..... + {( - 1)^n}{C_n}$ बराबर होगा

A

${2^n}$

B

${2^n} - 1$

C

$0$

D

${2^{n - 1}}$

Solution

हम जानते हैं ${(1 + x)^n} = {\,^n}{C_0} + {\,^n}{C_1}x + {\,^n}{C_2}{x^2} + …. + {\,^n}{C_n}{x^n}$

$x = -1$ रखने पर,

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

इसलिए ${C_0} – {C_1} + {C_{_2}} – {C_3} + …. + ( – 1){\,^n}{C_n} = 0$

 

Standard 11
Mathematics

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