1)a6=a1+5d, a6=5+15=20
a10=a1+9d, a10=5+27=32
2)b3=b1.q², b3=5.9=45
b5=b1.qˇ4=5.81=405
3)a4=a1+3d, a1=a4-3d, a1=11-6=5
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1)a6=a1+5d, a6=5+15=20
a10=a1+9d, a10=5+27=32
2)b3=b1.q², b3=5.9=45
b5=b1.qˇ4=5.81=405
3)a4=a1+3d, a1=a4-3d, a1=11-6=5