Помогите по математике? ​

Question

Помогите по математике? ​

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Answer 1

1) q=3; a4=4.5 * 3=13.5; и a5=13.5*3=40.5

2) q=2; a6=4.8*2=9.6; и a7=9.6*2=19.2

3) q=3; a4=0.63*3=1.89; и a5=1.89*3=5.67