" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
S2= a(r²-1) / r-1
S4/S2 = 40/4
a(r⁴ -1)/r-1 x r-1 / a(r²-1) =10
coret2
tinggal ini
(r⁴-1)/(r²-1)=10
faktorkan
(r²-1)(r²+1) / r²-1=10
coret lagi
r²+1= 10
r²+1-10=0
r²-9=0
(r+3)(r-3)
r=3 atau r=-3
rasionya r=3 atau r=-3
S2= a(r²-1)/r-1
4= a(2²-1)/2-1
4=a(4-1)
a=4/3
jadi suku pertamanya 4/3