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=A1+A2/2 =A1+A3/2 =(A1+A2+A3)/3 =A1+A2+A3/A1*A2*A3
a+a2=2a3 a2•a3=a6 (2a4)4=16a8 (-a)6÷a3=a3
a2+a2=2a4 2a2×a3=2a6 3a﹣2a=1 (a2)3=a6
a+a=a2 (2a)3=6a3 (a﹣1)2=a2﹣1 a3÷a=a2
3a2·(-2a3)=6a6 a(a2-1)=a3-1 (a+b)(a-2b)=a2-ab-2b2 -2a·(a2)3=-2a9
F={A1→A2,A1→A3} F={A1→A2} F={A1→A2} F={A1A3→A2,A1A2→A3}
a2+a3=a5 (-2a2)3=-6a6 (2a+1)(2a-1)=2a2-1 (2a3-a2)÷a2=2a-1
=(A1+A2+A3)/3 =SUM(A1:A3)/3 =AVERAGE(A1:A3) =AVERAGE(A1:A2:A3)
=A1+A2/2 =A1+A3/2 =(A1+A2+A3)/3 =A1+A2_A3/A1*A2*A3
=A1+A2/2 =A1+A3/2 (A1+A2+A3)/3 A1+A2+A3/A1*A2*A3
=A1+A2+A3/3 =SUM(A1:A3)/3 =AVERAGE(A1:A3) =AVERAGE(A1:A2:A3)
'=(A1+A2+A3)/3 '=SUM(A1:A3)/3 '=AVERAGE(A1:A3) '=AVERAGE(A1:A2:A3)