Answer:
an=a1+(n-1)d an=a1+(n-1)d
21=1+(5-1)d a2=1+(2-1)5
21-1=4d a2=1+(1)5
20=4d a2=1+5
20=4d a2=6
4 4
5 = d
a3=1+(3-1)5 a4=1+(4-1)5
a3=1+(2)5 a4=1+(3)5
a3=1+10 a4=1+15
a3=11 a4=16
Answer:-1,-11,-15,-21-1,-11,-15,-21-1,-11,-15,-21-1,-11,-15,-21not sure kung Tama pero sana makatulong hula lang kase
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Answer:
What is the third arithmetic mean between 1 and 21?
an=a1+(n-1)d an=a1+(n-1)d
21=1+(5-1)d a2=1+(2-1)5
21-1=4d a2=1+(1)5
20=4d a2=1+5
20=4d a2=6
4 4
5 = d
an=a1+(n-1)d an=a1+(n-1)d
a3=1+(3-1)5 a4=1+(4-1)5
a3=1+(2)5 a4=1+(3)5
a3=1+10 a4=1+15
a3=11 a4=16
1,6,11,16,21
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Answer:-1,-11,-15,-21-1,-11,-15,-21-1,-11,-15,-21-1,-11,-15,-21not sure kung Tama pero sana makatulong hula lang kase