Class 11MathematicsSequences and Seriesnth term of special series, Sum to n terms and Infinite number of terms
Easy$a_{n} = (n-1)(2-n)(3+n)$ દ્વારા વ્યાખ્યાયિત શ્રેણીનું $20$ મું પદ શું છે?
- A$-7866$
- B$-7860$
- C$-7872$
- D$-7854$
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Similar Questions
${{(0.2)}^{{{\log }_{\sqrt{5}}}\left( \frac{1}{4} + \frac{1}{8} + \frac{1}{16} + \dots \infty \right)}}$ નું મૂલ્ય શોધો:
Difficult
View Solution$1 \cdot 3^2 + 2 \cdot 5^2 + 3 \cdot 7^2 + \dots$ શ્રેણીનો $20$ પદો સુધીનો સરવાળો કેટલો થાય?
MediumIIT 1973
View Solution$\frac{1^3 + 2^3 + 3^3 + 4^3 + \dots + 12^3}{1^2 + 2^2 + 3^2 + 4^2 + \dots + 12^2} = $
Easy
View Solution$\sum_{k=1}^{\infty} \sum_{r=0}^k \frac{1}{3^k} \binom{k}{r}$ ની કિંમત શોધો.
$\sum_{k=1}^{2n+1} (-1)^{k-1} \cdot k^2$ ની કિંમત શોધો.
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