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b=U2-U1
=-1-(-5)
=4
Un=a+(n-1)b
U53=-5+(53-1)4
=-5+(52)4
=-5+208
=203
srmoga bnar yaa
u2-u1= -5-(-1)=4
suku ke-53:
un=a+(n-1)b
u53= -5+(53-1)4
= -5+52x4
= 203