(1)/(1)+(1)/(1+2)+(1)/(1+2+3)+.........2020 पद =(एम)/(एन) जहां m, n सहअभाज्य प्राकृतिक संख्याएँ हैं...

(1)/(1)+(1)/(1+2)+(1)/(1+2+3)+.........2020 terms =(m)/(n) where m, n are coprime natural numbers then (m)/(n-1) is equal to (1) 1 (2) 2 (3) 3 (4) None of these

1+(1)/(1+2)+(1)/(1+2+3)+(1)/(1+2+3+n)=(2n)/(n+1)

If frac(1)(x+frac(1)(y+frac(2)(z+frac(1)(4)))) = 29/79 where x,y and z are natural numbers, then the value of (2x + 3y -z)is: यदि फ़्रेक (1) (x + फ़्रेक (1) (y + फ़्रेक (2) (z + फ़्रेक (1) (4)))) = 29 / 79 जहाँ x, y और z प्राकृतिक संख्याएँ हैं, तब (2x + 3y -z) का मान है:

(1)/(1.2)+(1)/(2.3)+(1)/(3.4)+.......+(1)/(n(n+1))=(n)/(n+1),n in N is true for

(1)/(1*2)+(1)/(2*3)+(1)/(3*4)+"…."+(1)/(n(n+1)) equals

Prove that (1)/(2)+(1)/(2^(2))+(1)/(2^(3))+.......+(1)/(2^(n))=1-(1)/(2^(n)),n in N

(1)/(1+a^(m-m))+(1)/(1+a^(m-n))=? a.0 b.(1)/(2) c.1