cbse class 10th math quick reference
TRANSCRIPT
Arithmetic Progression
Sum Of First n Natural number is n(n+1) /2
Nth term from end l-(n-1)d , where l is the last term
Sn=n/2 (a + l) = n/2(a + an)
TRANSCRIPT
Arithmetic Progression
Sum Of First n Natural number is n(n+1) /2
Nth term from end l-(n-1)d , where l is the last term
Sn=n/2 (a + l) = n/2(a + an)