" (d) श्रेढी "a+b,a-2b,a-5b,...." का "(n+1)" वाँ पद। "

If sum_(r=1)^n r(r+1)(2r+3)=a n^4+b n^3+c n^2+d n+e , then (a) a-b=d-c (b) e=0 (c) a , b-2//3, c-1 are in A.P. (d) (b+d)//a is an integer

If sum_(r=1)^n r(r+1)(2r+3)=a n^4+b n^3+c n^2+d n+e , then (a) a-b=d-c (b) e=0 (c) a , b-2//3, c-1 are in A.P. (d) (b+d)//a is an integer

Revision|समांतर श्रेढ़ी का n वाँ पद|अभ्यास प्रश्न|अभ्यास प्रश्न|OMR|Summary

समांतर श्रेणी का n वा पद -उदाहरण सहित |समांतर श्रेणी का अंत से n वा पद

match the columns (a) a -4, b-2,c-5,d-1 (b) a-4,b-5,c-2,d-1 (c) a-4,b-5,c-1,d-2 (d) a-5, b-4,c-1,d-2

If b_(1),b_(2),b_(3),"….."b_(n) are positive then the least value of (b_(1) + b_(2) +b _(3) + "….." + b_(n)) ((1)/(b_(1)) + (1)/(b_(2)) + "….." +(1)/(b_(n))) is

Determine whether or not each of the definition of * given below are binary operations, justify your answer. (a) a * b = ab^(2) on Z^(+) , (b) a * b = |a-b| on Z^(+) ( c) a * b = a on Z^(+) , (d) a * b=a+1 +1 on N ( e) a * b =a+b -2 on N , (f) a * b =a//2b on N.

If (a)/(b)=(4)/(3), then (3a+2b)/(3a-2b)=?( a) -1 (b) 3 (c) 5(d)6

Let A and B be two sets such that n(A)=5\ a n d\ n(B)=2,\ if\ a ,\ b ,\ c ,\ d ,\ e are distinct and (a ,2),\ (b ,3),\ (c ,2),\ (d ,3),\ (e ,2) are in AxxB , find A and B.