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Nomor 2.
Beda suku menaik:
Maka, dua suku berikutnya adaah 26, dan 33.
Nomor 3.
Maka, 5 suku pertamanya adalah:
-3, 3, 13, 27, 45
=3√4√3 - 2√9√2 +4√9√5
= 6√3 - 6√2 + 12√5
= 10,392 - 8,485 + 26,833
=28,740
2. 6,8,11.15.20. 26, 33
3. un = 2n² - 5
u1= 2.1² -5 =2 -5 = -3
u2 =2.2² - 5 = 8 -5=3
u3=2.3² - 5 = 18-5=13
u4= 2.4²-5 = 32-5 = 27
u5= 2.5² = 5 = 50-5= 45