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Questions  

If sum of the coefficients in the expansion 2x23cx+c2)17 is zero, then c is equal to 

a
2, 3
b
1, 2
c
1, 3
d
2, – 1

detailed solution

Correct option is B

Sum of the coefficients =2−3c+c217We are given 2−3c+c217=0⇒c2−3c+2=0⇒c=1,2

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