hi I need your help
please solve
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Answered by
12
Step-by-step explanation:
Sn=n/2{2a+(n-1) d}
S30=30/2(20+(30-1)5)
=15(20+29×5)
=15×165
=2475
HOPE I HELPED U UNNIE
Answered by
3
Answer:
i hope it will help you
Step-by-step explanation:
Sn=n/2[2a+(n-1)d]
therefore
S30=30/2[2×10+(30-1) 5]
=15[20+29×5]
=15[20+154]
=15×165
=2475
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