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যদি P = 21(21^2-1^2)(21^2-2^2)(21^2-3^2)...

যদি P = 21(21^2-1^2)(21^2-2^2)(21^2-3^2)...............(21^2) -10^2), nP a দ্বারা বিভাজ্য। 22...

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If P = 21(21^2-1^2)(21^2-2^2)(21^2-3^2)...............(21^2-10^2),t h e nP is divisible by a. 22 ! b. 21 ! c. 19 ! d. 20!

25. The value of (21_C_1- 10_C_1) +(21_C_2- 10_C_2)+ (21_C_3- 10_C_3) +...............+(21_C_10- 10_C_10)

25. The value of (21_C_1- 10_C_1) +(21_C_2- 10_C_2)+ (21_C_3- 10_C_3) +...............+(21_C_10- 10_C_10)

((21)/(10))^(x)=2 then x = ?

R={(2,1),(2,2),(2,3),(2,4)}

The value of (^21C_1-^10C_1)+(^21C_2-^10C_2)+....+(^21C_(10)-^10C_(10)) is

Factorize: 21x^(2)-2x+(1)/(21)

The value of (21_C_1-10_C_1)+(21_C2-10_C_2)+ (21_C_3-10_C_3) + (21_C_4-10_C_4) + ...........(21_C_10- 10_C_10) is: