Question

Dada a função 3x² - 7x+15, calcule:
a) f(0) - f(1)=
b) f(2) + f(1)=

Answer 1

a)3.0.0 - 7.0 +15 - (3.1.1 - 7.1 +15)
15-(3-7+15)
15-3+7-15
-3+7
4
b)3.2.2 - 7.2 +15 + 3.1.1 - 7.1 +15
12 -14 +15 + 3 -7 +15
-2 +15 -4 +15
-6+15+15
-6+30
24

Answer 2

Olá, bom dia ☺

Resoluções:

a)

f(0) - f(-1)=?.

(3.0² - 7.0 + 15) - (3.1² - 7.1 + 15)

15 - (3 - 7 + 15)

15 - (+11)

15 - 11

= 4.

b)

f(2) +.f(1) = ?

(3.2² - 7.2 + 15) + ( 3.1² - 7.1 + 15)

(12 - 14 + 15) + (3 - 7 + 15)

( -2 + 15) .+ (+11)

13 + 11

= 24

Bons estudos :)