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" 5.If "sum(i=1)^(20)((20(i-1))/(^20C(i)...

" 5.If "sum_(i=1)^(20)((20_(i-1))/(^20C_(i)+^(20)C_(i-1)))^(3)=(k)/(21)," then "k" equals "

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If Sigma_(i=1)^(20) ((""^(20)C_(i-1))/(""^(20)C_(i)+""^(20)C_(i-1)))^(3)=(k)/(21) , then k equals

If Sigma_(i=1)^(20) ((""^(20)C_(i-1))/(""^(20)C_(i)+""^(20)C_(i-1)))^(3)=(k)/(21) , then k equals

If Sigma_(i=1)^(20) ((""^(20)C_(i-1))/(""^(20)C_(i)+""^(20)C_(i-1)))^(3)=(k)/(21) , then k equals

If Sigma_(i=1)^(20) ((""^(20)C_(i-1))/(""^(20)C_(i)+""^(20)C_(i-1)))^(3)=(k)/(21) , then k equals

If sum_(i=1)^(20)((""^(20)C_(i-1))/(""^(20)C_(i)+""^(20)C_(i=1)))^(3)=k/21 , then k/20 equals _________.

If sum_(i=1)^(10) ( (""^10C_(i-1))/(""^10C_i + ""^10C_(i-1) ))^3 = (k)/(11) , then k equals :

sum_(i=1)^20 [(.^20C_(i-1))/(.^20C_i+.^20C_(i-1))]^3=k/21 then find the value of k. (a) 400 (b) 100 (c) 50 (d) 200

sum_(i=1)^20 (.^20C_(i-1))/(.^20C_i+.^20C_(i-1))=k/21 then find the value of k. (a) 400 (b) 100 (c) 50 (d) 200

sum_(k=0)^(20)(.^(20)C_(k))^(2) is equal to