Find the sum of 7 terms of an arithmetic sequenc Those first and last term are 10 and 40 espectively.

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regiegolez @regiegolez

November 2022 1 3 Report

Find the sum of 7 terms of an arithmetic sequenc Those first and last term are 10 and 40 espectively.

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Verified answer

Answer:

S7=175

Step-by-step explanation:

Sn=n/2(a1 + an)

S7= 7/2 (10 + 40)

= 7/2(50)

= (7/2)(50/1)

=350/2

=175

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