IF A=1-10+3-12+5-14+7+… upto 60 terms , ...

IF `A=1-10+3-12+5-14+7+…` upto 60 terms , then what is the value of A?

A

`-360`

B

`-310`

C

`-240`

D

`-270`

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