find the sum of the first 27 term of ap a1+a2+a3 .if is is k own that a1+a5+a11+a17+a23+a27=228
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Answer for above question is 423.09
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Answer:
S27=1026
Step-by-step explanation:
a1+a5+a11+a17+a23+a27=228
a+a+4d+a+10d+a+16d+a+22d+a+26d=
228
6a+78d=228
a+13d=38
S27= 27÷2(2a+28d)
= 27(a+13d)
=27(38)
=1026
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