Question

The first term and the last term of a finite A.P. are 2 and 20 respectively, then the sum of all the 200 terms

of this A.P. is​

Answer 1

Answer:

$sn = n \div 2 \: (a + an)$

$sn = 200 \div 2(2 + 20)$

$sn = 100 \times 22$

$sn = 2200$

$hope \: this \: will \: help \: you \: plz \: mark \: as \: brainlist \: answers$