Question

- If A = 1 - 10 +3 - 12 + 5 - 14 + 7 + ... upto 60 terms, then what is the value of A?
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Answer 1

Answer:

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Step-by-step explanation:

Answer 2

Answer:

A=1-10+3-12+5-14.....upto 60 terms.

A=(1+3+5+7....30terms)-(10+12+14....30terms)

A=15[2+(30-1)2]-15[20+(30-1)2]

A=15(60)-15(78)

A=-270