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b) f(-3) = 2.(-3) + 5 = -6 + 5 = -1
f(6) = 2.6 + 5 = 12 + 5 = 17
f(10) = 2.10 + 5 = 20 + 5 = 25
2a) h(x) = -x + 3
b) h(-2) = -(-2) + 3 = 2 + 3 = 5
h(0) = -(0) + 3 = 3
h(4) = -4 + 3 = -1
h(3) = -3 + 3 = 0
3) f(x) = 5 - 3x
a) f(-2) = 5 - 3 (-2) = 5 + 6 = 11
b) f(p + 3) = 5 - 3(p + 3)
= 5 - 3p - 9
= -3p - 4
c) f(q - 2a) = 5 - 3(q - 2a)
= 5 - 3q + 6a
4) g(x) = 2x² - 7
a) g(6) = 2.6² - 7
= 2.36 - 7
= 72 - 7
= 65
g(-4) = 2.(-4)² - 7
= 2.16 - 7
= 32 - 7
= 25
b) g(a) = 11
2a² - 7 = 11
2a² - 7 - 11 = 0
2a² - 18 = 0
a² - 9 = 0
(a + 3) (a - 3) = 0
a = -3 atau a = 3
5. h(x) = 4x + 5
a) h(n) = 29
4n + 5 = 29
4n = 29 - 5
4n = 24
n = 6
b) h(n) = 3
4n + 5 = 3
4n = 3 - 5
4n = -2
n = -2/4
n = -1/2
semoga membantu ya :)
b. f(-3) = 2. (-3)+5 = -1
f(6) = 2.6+5 = 17
f(10) = 2.10+5 = 25
2. a. h(x) = -x+3
b. h(-2) = -(-2) +3 = 5
h(0) = 0 +3 = 3
h(4) = -4+3= -1
h(3) = -3+3 = 0
3. a. f(-2) = 5 - 3(-2) = 5+6=11
b, f(p+3) = 5 - 3(p+3) = 5-3p-3 = 2-3p
c. f(q-2a) = 5 - 3(q-2a)= 5-3q+6a
d. f (5) = 5 - 3(5) = 5-15 = -10
4. a. g(6) = 2. 6² - 7= 65
g (-4) = 2. (-4)² - 7 = 25
b. g(a) = 11
g(a) = 2. a² - 7 = 11
2a² = 18
a² = 9
a = 3
5. a. h(n) = 4n+5 = 29
4n = 24
n = 6
b. h(n) = 4n+5 = 3
4n = -2
n = -1/2