What is the common difference of an A.P. in which a21-a7=84
Answers
Answered by
7
a21=a+20d
and a7 =a+6d
so,
a+20d-(a+6d)=84
a+20d-a-6d=84
14d=84
d=6
if u like mark as brainliest
and a7 =a+6d
so,
a+20d-(a+6d)=84
a+20d-a-6d=84
14d=84
d=6
if u like mark as brainliest
yneelesh337:
Thanks
Answered by
6
a21= a+20d
a7 = a+6d
So, a21- a7 = 84
a + 20d - a-6d = 84
14d = 84
d = 84 /14 = 6
a7 = a+6d
So, a21- a7 = 84
a + 20d - a-6d = 84
14d = 84
d = 84 /14 = 6
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