Math, asked by manishkum85, 1 year ago

Ap is 3,7,11.... Sum of 1 st n terms is 253.find the value of n

Answers

Answered by Manpreetkaur111
0




Sn=n/2[2a+(n-1)d]
253=n/2[2(3)+(n-1)4]
253=n/2[6+4n-4]
253=n/2[2+4n]
Similar questions