Question

S17=24. S24=17. S41=?​

Answer 1

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${\bf{\implies S_17=24}}$

${\bf{\implies 24= \frac {17}{2}\times 2a+(n-1)dd}}$

${\bf{\implies \frac {24}{17}= a+16d--(1)}}$

${\bf{\implies 17=(\frac {24}{2})\times 2a+(n-1)d}}$

${\bf{\implies (\frac{17}{12})= 2a+23d--(2)}}$

Multiply eq (1) by 2 and Subtract

We get 9d = 317/204

D = 317/1836

A = 0.02

S41 = 41/2(0) = 0

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