1.

Find the value of the polynomial 2x – 2x3 + 7 using given values for x = -1.

Answer»

 p(x) = 2x – 2x3 + 7

Put x = -1 in the given polynomial

∴  p(- 1) = 2(- 1) – 2(-1)3 + 7 

= – 2 – 2(-1) + 7 

= -2 + 2 + 7 

∴ p(-1) = 7



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