Tolong bantu kerjakan no 3. dan 5

Tolong bantu kerjakan no 3. dan 5

Notasi SiGMa

$sf sum_{k}^n{ p(k) + q(k) } = sum_{k}^n p(k) + sum_{k}^n q(k)$

Penjelasan dengan langkah-langkah:

$sf 3. sum_{k = 5}^{30} (2- p_k) = 24. maka nilai sum_{k= 5}^{30} p_k = ...$

$sf sum_{k = 5}^{30} (2) - sum_{k = 5}^{30} p_k = 24.$

$sf sum_{k = 5}^{30} p_k = sum_{k = 5}^{30} (2) - 24.$

$sf sum_{k = 5}^{30} p_k = 2(30-4) - 24= 28$

$sf 5. sum_{i = 1}^{100} 3 + sum_{i = 26}^{50} 7 =$

$sf = 3(100-0)+ 7(50-25)\\ = 300 + 175\\= 475$