Tolong dibantu ya Besok dikumpul Makasih :)

[tex]\LARGE S1=\frac{a}{1-p}[/tex]
[tex]\LARGE a^2=225-450p+225p^2[/tex]

[tex]\LARGE S2=\frac{a^2}{1-p^2}[/tex]
[tex]\LARGE 45-45p^2=225-450p+225p^2[/tex]
[tex]\LARGE 270p^2-450p+180=0[/tex]
[tex]\LARGE 3p^2-5p+2=0[/tex]
[tex]\LARGE (3p-2)(p-1)=0[/tex]
[tex]\LARGE p=\frac{2}{3}\vee 1[/tex]
[tex]\LARGE 15=\frac{a}{1-\frac{2}{3}}[/tex]
[tex]\LARGE a=5[/tex]
[tex]\LARGE U1=5\cdot\frac{2}{3}[/tex]

Maaf Jika ada salah Hitung.