find the sum of first 20 terms of an arithmetic progression in which the third term is 7 amd seventh term is 2 more than thrice its third term
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Answer:
S20= 702.5
Step-by-step explanation:
Refer to the attachment.!
I hope it's helpful
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aaryanbilal:
thank yu
what is d
what is the full form of ut
it*
thankxxxxxxxxxxxxxxx
thanks for the steps but you missed something the answer comes s20=740. solve it properly and thank you soo much
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