Question

dado a função f(x): -2x+3, determine:

a) f(1/3)

b) f(-1/2)

Answer 1

a) f(x): - 2x²+3
f(1): - 2·1²+3
f(1): -2²+3
f(1):+4+3
f(1): 7

b) f(0):- 2·0²+3
f(0): 0²+3
f(0): 0+3
f(0): 3

c)
f( \frac{-1}{2}): -2\cdot (\frac{-1}{2})^{2}+3 \\ \\ f( \frac{-1}{2}): \frac{-2}{1} \cdot (\frac{-1}{2})^{2}+3 \\ \\ f( \frac{-1}{2}): (\frac{2}{2})^{2}+3 \\ \\ f( \frac{-1}{2}): 1^{2}+3 \\ \\ f( \frac{-1}{2}): 1+3 \\ \\ f( \frac{-1}{2}): 4

Espero ter ajudado