[tex].[/tex]
f(x) = 2x³ + 2x² - 2x² × 2x³ - 2x²
f(11) = ...
f(12) = ...
f(13) = ...
f(14) = ...
f(15) = ...
f(16) = ...
f(17) = ...
f(18) = ...
f(19) = ...
f(20) = ...
f(21) = ...
lagi baik banget lho -^-
f(x) = 2x³ + 2x² - 2x² × 2x³ - 2x²
= 2x³ + 0 × 2x³ - 2x²
= 2x³ - 2x²
f(11) = 2(11)³ - 2(11)²
= 2(1331) - 2(121)
= 2662 - 242
= 2.420
f(12) = 2(12)³ - 2(12)²
= 2(1728) - 2(144)
= 3456 - 288
= 3.168
f(13) = 2(13)³ - 2(13)²
= 2(2197) - 2(169)
= 4394 - 338
= 4.056
f(14) = 2(14)³ - 2(14)²
= 2(2744) - 2(196)
= 5488 - 392
= 5.096
f(15) = 2(15)³ - 2(15)²
= 2(3375) - 2(225)
= 6750 - 450
= 6.300
f(16) = 2(16)³ - 2(16)²
= 2(4096) - 2(256)
= 8592 - 512
= 8.080
f(17) = 2(17)³ - 2(17)²
= 2(4913) - 2(289)
= 9826 - 578
= 9.244
f(18) = 2(18)³ - 2(18)²
= 2(5.832) - 2(324)
= 11664 - 648
= 11.016
f(19) = 2(19)³ - 2(19)²
= 2(6859) - 2(361)
= 13718 - 722
= 12.996
f(20) = 2(20)³ - 2(20)²
= 2(8000) - 2(400)
= 16000 - 800
= 15.200
f(21) = 2(21)³ - 2(21)²
= 2(9261) - 2(441)
= 18522 - 882
= 17.640
Jawab:
Penjelasan dengan langkah-langkah:
[tex]f(x) = 2x^3+2x^2-2x^2\times 2x^3 - 2x^2\\f(x) = 2x^3 - 4x^5 = -2x^3(2x^2-1)[/tex]
[tex]f(11) = -2\cdot 11^3(2\cdot 11^2-1) = -2662\cdot 241 =-58332 \\f(12) = -2\cdot 12^3(2\cdot 12^2 - 1) = -3456\cdot 287 = -991872\\f(13) = -2\cdot 13^3 (2\cdot 13^2 - 1) = -4394\cdot 337 = -1480778[/tex]
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