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7.Binomial Theorem
easy
$^{10}{C_1}{ + ^{10}}{C_3}{ + ^{10}}{C_5}{ + ^{10}}{C_7}{ + ^{10}}{C_9} = $
A
${2^9}$
B
${2^{10}}$
C
${2^{10}} - 1$
D
એકપણ નહિ.
Solution
(a) We know that
${2^{n – 1}} = {\,^n}{C_0} + {\,^n}{C_2} + {\,^n}{C_4} + …. = {\,^n}{C_1} + {\,^n}{C_3} + {\,^n}{C_5} + …..$
So, $^{10}{C_1} + {\,^{10}}{C_3} + {\,^{10}}{C_5} + ….. + {\,^{10}}{C_9} = {2^{10 – 1}} = {2^9}$
Standard 11
Mathematics