1,5,9..... what is the sum of first 20 terms of this arithmetic sequence?
Answers
Answered by
1
1+5+9+13+17+21+25+29+33+37+41+45+49+53+57+61+65+69+73+77=780
123456789105:
Thanks
Answered by
1
1+5+9+13+17+21+25+29+33+.....=780
Similar questions