In an AP, if the common difference (d) = - 4 , and the seventh term (a7) = 4 , then find the first term.
Answers
Answered by
6
a7=a+6d
a+6d=4
d=-4(given)
a+6(-4)=4
a-24=4
a=4+24
a=28
therefore, first term of an AP is 28
a+6d=4
d=-4(given)
a+6(-4)=4
a-24=4
a=4+24
a=28
therefore, first term of an AP is 28
jesvitabarboza:
a+6(-4)=4 not 5
a= 28
sry
i have corrected it
Mistakes happen it's k
Answered by
7
d=-4
T7=4
T1=a=?
a+n-1)d
T7=a+6d
4=a-24
a=24+4
a=28
T7=4
T1=a=?
a+n-1)d
T7=a+6d
4=a-24
a=24+4
a=28
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