Question

sum of 100 terms of an AP whose nth term is 2n+1 is _

Answer 1

Answer:

Sum of 100 terms in the A.P is 10200

Step-by-step explanation:

$n = 100$

$tn = 2n + 1$

$t1 = 2(1) + 1 = 3$

$t100 = 2(100) + 1 = 201$

$l = 201$

Sn=

$\frac{n}{2} (a + l)$

Sn=

$\frac{100}{2} (3 + 201)$

Sn=

$\frac{100 \times 204}{2}$

Sn=10200