Let P=sum(r=1)^50 (^(50+r)Cr(2r-1))/(^50...

Let `P=sum_(r=1)^50 (^(50+r)C_r(2r-1))/(^50C_r(50+r)),Q=sum_(r=0)^50(^50C_r)^2,R=sum_(r=0)^100(-1)^r(^100C_r)^2`

Let P=sum(r=1)^50 (^(50+r)Cr(2r-1))/(^50Cr(50+r)),Q=sum(r=0)^50(^50Cr)...
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If zr : r=1,2,3, ,50 are the roots of the equation sum(r=0)^(50)z^r=0 ...
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Let P=sum(r=1)^50 (^(50+r)Cr(2r-1))/(^50Cr(50+r)),Q=sum(r=0)^50(^50Cr)...
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If sum(r=0)^25 {.^50Cr*^(50-r)C(25-r)}=K(.^50C25), then K is equal to
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The value of 50 sum(r=1)^(49)(2r^(2) - 48r +1)/((50-r).""^(50)C(r)) is...
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Let z(r),r=1,2,3,...,50 be the roots of the equation sum(r=0)^(50)(z)^...
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Show that sum(r = 0)^50 (""^100Cr).(""^200C(150+r)) = ""^300C50
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Let P = sum(r=1)^(50) (""^(50+r)C(r)(2r-1))/(""^(50)C(r)(50+r)), Q = s...
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Let P =sum(r=1)^(50)(""^(50+r)C(r)(2r-1))/(""^(50)C(r)(50+r)), Q = sum...
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