1.) 4+8+16+32+... S4: .... S5: .... 2.) 5+15+45+... S4: .... S5: .... 3.) -3+9+(-27)+81+... S4: .... S5: .... Tolong ya dijawab soalnya aku kurang paham nih sm

.a=4,r=2
S4=a(r⁴-1)/r-1
=4(2⁴-1)/2-1 =60
S5=a(r⁵-1)/r-1
=4(2⁵-1)/2-1=124
2.a=5,r=3
S4=a(r⁴-1)/r-1
=5(3⁴-1)/3-1 =200
S5=a(r⁵-1)/r-1
=5(3⁵-1)/3-1=605
3.a=-3,r=-3
S4=a(1-r⁴)/1-r
=-3(1-(-3⁴))/1-(-3) =-20
S5=a(1-r⁵)/1-r
=-3(1-(-3⁵))/1-(-3)=61
jadikan jawaban terbaik jika membantu ya :)