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JEE Main20248 Apr 2024Evening ShiftMathematicsSequences and SeriesActual

An arithmetic progression is written in the following way The sum of all the terms of the 10^ th row is_______

Correct answer

0

Step-by-step solution

aligned & 2,5,11,20, . . & General term = 3 n^2-3 n+4 2 & aligned & T ₁₀= 3(100)-3(10)+4 2 & = 137 & 10 terms with c.d. =3 & sum = 10 2 (2(137)+9(3)) &=1505 aligned aligned

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