What is the sum of the first 17 terms of an a | vedclass

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Question

(NONE) Given:
First term $(a)$ = $20$
Last term $(l)$ = $28$
Number of terms $(n)$ = $17$
The formula for the sum of an arithmetic progression whe

Vedclass · Accepted Answer

$408$

Vedclass · Answer

(NONE) Given:
First term $(a)$ = $20$
Last term $(l)$ = $28$
Number of terms $(n)$ = $17$
The formula for the sum of an arithmetic progression when the first and last terms are known is:
$S_n = \frac{n}{2} (a + l)$
Substituting the values:
$S_{17} = \frac{17}{2} (20 + 28)$
$S_{17} = \frac{17}{2} (48)$
$S_{17} = 17 	imes 24$
$S_{17} = 408$

$848$	$420$	$206$	$99$	$45.5$
$664$	$(A)$	$(B)$	$(C)$	$(D)$	$(E)$

What is the sum of the first $17$ terms of an arithmetic progression if the first term is $20$ and the last term is $28$?

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Find the odd number in the given sequence: $3, 5, 13, 43, 176, 891, 5353$.

What is the value of $14^{3} + 16^{3} + 18^{3} + \ldots + 30^{3}$?

$18, 27, 49, 84, 132, (?)$

Observe the following table and determine which number will come in place of $(D)$:
$848$ $420$ $206$ $99$ $45.5$
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