1.

Tl L PR ULT के द्वए9 न 5 हा वह टाथातर ह कि ञ

Answer»

Sn=5n^2 +11nS1=a1=5 (1×1)+11×1=5+11=16

S2=a1+a2=5(2×2)+11×2=42a2=42-16=26

d=a2-a1=26-16=10

Tn=a+(n-1)×dTn=16+(n-1)10Tn=16+10n-10Tn=6+10n



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