Question

(-4)+(-1)+2+5+....x=437.find x class 10 AP question​

Answer 1

Answer:

Sn=437

Sn=(n/2(2a+(n-1)d)

437=n/2(-8+n*3-3)

874=-8n+3n^2-3n

874=-11n+3n^2

By factorization

n=19

tn=a+(n-1)d

=-4+(19-1)3

=-4+18*3

=54-4

tn=50

So x=50

Please mark it as a brainliest answer