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(1-X)(1+2X)(1-3X).....................................(1+14X)(1-15X) the coefficient of X^2 is a. -121 b. -191 c. -255 d.-291

(1-X)(1+2X)(1-3X).....................................(1+14X)(1-15X)

the coefficient of X^2 is

a. -121

b. -191

c. -255

d.-291

Grade:12th pass

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