Fill up the table with the common difference and the indicated term to be solved NO ARITHMETIC COMMON to be Term solved SEQUENCE DIFFERENCE 1 -2.2, 0, 2.2, 4.4, .. 2.2 20th
Answer:
→ d=2.2
→ a20=39.6
Solution:
#TO FIND THE COMMON DIFFERENCE (D)#
a1=-2.2 n=3
d=? an=2.2
an=a1+(n-1)d
2.2=-2.2+(3-1)d
2.2=-2.2+2d
2.2+2.2=2d
4.4=2d
4.4/2=2d/2 (Divide both sides by 2)
d=2.2
#TO FIND THE 20th Term#
a1=-2.2 a20=? (Unknown)
d=2.2 n=20
an=a1+(n-1)d
a20=-2.2+(20-1)(2.2)
a20=-2.2+(19) (2.2)
a20=-2.2+(41.8)
a20=39.6
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