1.) What is the arithmetic mean between -10 and 10.
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1.) What is the arithmetic mean between -10 and 10.
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Answer:
-10,0,10
Step-by-step explanation:
an=a1+(n-1)d
a3=-10+(3-1)d
10=-10+2d
10+10=2d
20=2d
20÷2=d
10=d