Question

calcule o valor de:
a)3x^3 -2x^2-x+5,para x=1.
B)(-1)^8-3.(-1)^5+(-1)^16

Answer 1

a) 3x³ - 2x² - x + 5 =

= 3 × 1³ - 2 × 1² - 1 + 5 =

= 3 × 1 - 2 × 1 - 1 + 5 =

= 3 - 2 - 1 + 5 =

= 8 - 3 =

= 5

b) (-1)^8 - 3×(-1)^5 + (-1)^16 =

= 1 - 3 × (-1) + 1 =

= 1 + 3 + 1 =

= 5

Espero ter ajudado!