For the A. P: -3, -7, -11,...., can we find a30-a20 without actually finding a30 and a20? Give reasons for your answer.
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Answered by
1
No, we have to find A30 and A20
Answered by
1
an-ak=d(n-k)
a30-a20=d(30-20)
d= -4
= -4(10)
= -40
plzz mark me as the brainliest
kenishadas4:
Why did you multiply -4 by 10??
d = -4 and 30-20 is 10
there is a formula just go through it well u will understand it well
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