Question 24 urgently .........
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Split it as two APs
4,7,10 ,... and -1/n,-2/n,...
S1+S2=n/2[2(4)+(n-1)3] + n/2 [-2/n+(n-1)-1/n]
n/2[3n+5]+n/2[-n-1/n]
3n²+4n-1/2
I hope it is correct
4,7,10 ,... and -1/n,-2/n,...
S1+S2=n/2[2(4)+(n-1)3] + n/2 [-2/n+(n-1)-1/n]
n/2[3n+5]+n/2[-n-1/n]
3n²+4n-1/2
I hope it is correct
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1
Ans here...below...see
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