Question

what is the sum of the first seven terns of the series 1,3,4,7,11,_,_?​

Answer 1

73 is the answer. ☺
1+3=4
3+4=7
4+7=11
7+11=18
11+18=29
so1+3+4+7+11+18+29=73

Answer 2

$given \: series \: 1 \: \: 3 \: \: 4 \: \: 7 \: \: 11.......... \\ \\ seven \: term \: of \: series \\ t1 = 1 \\ t2 = 3 \\ t3 = 1 + 3 = 4 \\ t4 = 3 + 4 = 7\\ t5 = 4 + 7 = 11 \\ t6 = 7 + 11 = 18 \\ t7 = 11 + 18 = 29 \\ \\ sum \: of \: these \: seven \: term \: t\: \\ \\ t = t1 + t2 + t3 + t4 + t5 + t6 + t7 \\ \\ t = 1 + 3 + 4 + 7 + 11 + 18 + 29 \\ \\ t = 73 \\ \\ your \: answer \: is \: 73$