if f (x)= 2x^3- 13x^2+17x + 12, find a.f (1), b. f (12), c.f (3/2)
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f (x) = 2(1)^3-13 (1)^2+17 (1)+12
= 2 (1)-13 (1)+17 (1)+12
=2-13+17+12
=31-13
= 15
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