Jawaban:
a. 5² - 5¹ + 5⁰ = 25 - 5 + 1 = 21
b. 3-¹ + 3-² = 1/3 + 1/9 = 4/9
c. (2/3)² + (2/3)-¹ = 4/9 + 3/2
= 8/18 + 27/18
= 35/18
d. (-3)² + (-3)³ + (-3)-¹
= 9 - 27 + 1/3
= -18 + 1/3
= -54/3 + 1/3
= -53/3
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Jawaban:
a. 5² - 5¹ + 5⁰ = 25 - 5 + 1 = 21
b. 3-¹ + 3-² = 1/3 + 1/9 = 4/9
c. (2/3)² + (2/3)-¹ = 4/9 + 3/2
= 8/18 + 27/18
= 35/18
d. (-3)² + (-3)³ + (-3)-¹
= 9 - 27 + 1/3
= -18 + 1/3
= -54/3 + 1/3
= -53/3