the first five term of an ap and the first seven term is 169, if the sum of the first term of this app is 235 find the sum of its first twenty terms
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Sn = (n/2){2a+(n-1)d}
where n= no. of terms ; a = first term; d = common difference; Sn = Sum of n terms
ANSWER: 705
where n= no. of terms ; a = first term; d = common difference; Sn = Sum of n terms
ANSWER: 705
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resonite16:
bye
At least put a thanks...
oh sorry I forgot
Thanks man
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so it's better if u take ur words back
Oh... Well Then u r like my elder sister...
ohk......
yeah u r not a man...
thanks
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