Question number 7
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given 7th term -4 and 13th term -16
a+(n-1)d=-4
a+(7-1)d=-4
a+6d=-4.....(1)
a+12d=-16.....(2)
a+(n-1)d=-4
a+(7-1)d=-4
a+6d=-4.....(1)
a+12d=-16.....(2)
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shravsm761:
Dude they asked sum
ya Sn is the sum
see -4 & -16 are the terms i.e. an
oh sorry no amp in between
There is mistake 16-36=-20 you wrote 20
Ssorry
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THIS IS THE SOLUTION IF ANY DOUBT ABOUT MY SOLUTION DM ME
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Tq macha
It's 190 plus
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