Question

If the first term of an arithmetic sequence is 10 and the 13th term is 58, what is the common difference?

Answer 1

first term=10=a (let)
13th term=58
now in arimetic sequence n th term is=a+(n-1)d
d=common difference
so, 13th term=a+(13-1)d=a+12d
now, a+12d=58
=>10+12d=58
=>d=4
so,common difference is 4.

Answer 2

thank you

Answer 3

welcome...