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(1) Setiap suku barisan adalah negatif
(2) Jumlah setiap 3 suku berurutan adalah ganjil
(3) -1 merupakan salah satu suku barisan
(4) Setiap selisih dua suku ganjil barisan adalah kelipatan 6
A. 0
B. 1
C. 2
D. 3
E. 4
Jawabannya: B
Soal 5. Barisan 14, (p-1), 6, 2, -2, ... merupakan barisan aritmetika.
Jika barisan baru dibentuk dengan membagi dua setiap suku barisan tersebut, maka rata-rata 10 suku pertama barisan yang baru adalah (PK UTBK 2022)
A. -2
B. -3
C. -4
D. -5
E. -6
Jawabannya: A
Soal 6. Earthquake is any sudden shaking of the ground caused by the passage of seismic waves through Earth’s rocks. Seismic waves are produced when some form of energy stored in Earth’s crust is suddenly released, usually when masses of rock straining against one another suddenly fracture and “slip.” Earthquakes occur most often along geologic faults, narrow zones where rock masses move in relation to one another.
The major fault lines of the world are located at the fringes of the huge tectonic plates that make up Earth’s crust.
Little was understood about earthquakes until the emergence of seismology at the beginning of the 20th century. Seismology, which involves the scientific study of all aspects of earthquakes, has yielded answers to such long-standing questions as why and how earthquakes occur.
