Math, asked by catherineachuzz, 2 months ago

The 4th term of an arithmetic sequence is 25. What is the sum of it's first 7 terms?

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Answers

Answered by animeshranjan024

0

Answer:

175

Step-by-step explanation:

given

a +3 d =25

S7 = (7/2)*[2*a + 6 d]

= (7/2)*[2(a+3d)]

= 7*25

= 175

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