Need help.
1+ 2+3+4+5+6+7+8+9+10+11+12+13+14+15+1 6+17+18+19+20+21+22+23+24+25+26+27+ 28+29+30

465

Step-by-step explanation:

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30=465

I don't know if this was an actual question, but have a nice day （*゜ー゜*）

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2