in A.p.L= 8, n = 8 ,S8 = -20 find a
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Answered by
12
here is ur answer in the picture
mark as brainliest if it helps u please...
mark as brainliest if it helps u please...
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Sweatasaha21:
so how u r gonna explain it , if u want to explain it here then OK
hmm ok
if -52/8 = -6.5 than -6.5*2 = -13 , u can use ur calculator for the conformation
hmm got it
I thought that 52÷8 is 9 but it's 6.5
u r right
I got it
thanks
u most welcome
yup
Answered by
28
Hey there!
We are given,
Last term, l = 8
No. of terms, n = 8
Sum of 8 terms
= -20
Now,
= n/2 × [a+l]
= 8/2 × [a+8]
-20 = 4 × (a+8)
a + 8 = -5
a = -13
Hence,
The first term, a = -13
Cheers!
We are given,
Last term, l = 8
No. of terms, n = 8
Sum of 8 terms
Now,
-20 = 4 × (a+8)
a + 8 = -5
a = -13
Hence,
The first term, a = -13
Cheers!
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