maths question pls solve
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Sn = 1/2n[2a + (n-1)d] formula
use this formula
put a=-47
n=27
d=7
use this formula
put a=-47
n=27
d=7
Answered by
0
a=-47
d=7
So,
S27=n/2(2a+(n-1)d)
=27/2(2×-47+26×7)
=27/2×88
=27×44
=1188
Ans
d=7
So,
S27=n/2(2a+(n-1)d)
=27/2(2×-47+26×7)
=27/2×88
=27×44
=1188
Ans
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