Question

1/15,1/12,1/10,......to 11 terms.​

Answer 1

Answer:

HOPE IT HELPS YOU.....✌️

Answer 2

Answer:

$\huge\sf\mathbb\color{lightblue} \underline{\colorbox{blue}{☠✨⚕answer⚕✨☠}}$

Step-by-step explanation:

$a = \frac{1}{15} ,d = \frac{1}{12} - \frac{1}{15} = \frac{5 - 4}{60} = \frac{1}{60} ,n = 11$

$∴ \: \: \: From \: , \: S _{n} = \frac{n}{2} [2a + (n - 1)d] ,$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: S_{11} = \frac{11}{2} [2 \times \frac{1}{15} + (11 - 1). \frac{1}{60} ]$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{11}{2} ( \frac{2}{15} + \frac{10}{60} )$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{11}{2} ( \frac{8 + 10}{60} )$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{11}{2} \times \frac{18}{60} = \frac{11}{2} \times \frac{3}{10}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{33}{20} . \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: answer \:$