Question

Diket suku n suatu barisan adalah Un=5 - 3n nilai dr u3 + u5 adlh

Answer 1

Un = 5-3n
U3 = 5-3(3)
= 5-9
= -4

Un = 5-3n
U5 = 5-3(5)
= 5-15
= -10

U3+U5
-4 + (-10)
-4 - 10 = -14

maaf kalau salah

Answer 2

U3= 5- 3(3) = 5-9= -4
u5= 5-3(5)= 5-15= -10

u3+u5=-4+(-10) =-14