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vjchhatriwala
@vjchhatriwala
October 2023
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plzz ans me tomorrow is my exam
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singhshantanu18218
Answer:
11×30=330 [from eq(i)]
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Mysteryboy01
Verified answer
[tex]Number \: of \: terms \: n = 11[/tex]
[tex]Middle \: term = \frac{11 + 1}{2} \\ \\ = \frac{12}{2} \\ \\ = 6 \: th \: term[/tex]
[tex]a_{6} = 30 \: (given) \\ \\ a + (6 - 1)d = 30 \\ \\ a + 5d =30.....(1)[/tex]
[tex]S _{n} = \frac{n}{2} [ 2a + (n - 1)d] \\ \\S _{11} = \frac{11}{2} [ 2a + (11 - 1)d] \\ \\S _{11} = \frac{11}{2} [ 2a + 10d] \\ \\ S _{11}= \frac{11 \times 2}{2} (a + 5d) \\ \\ S _{11}= 11 \times 30 \\ \\ S _{11} = 330[/tex]
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Answer:
11×30=330 [from eq(i)]
Verified answer
[tex]Number \: of \: terms \: n = 11[/tex]
[tex]Middle \: term = \frac{11 + 1}{2} \\ \\ = \frac{12}{2} \\ \\ = 6 \: th \: term[/tex]
[tex]a_{6} = 30 \: (given) \\ \\ a + (6 - 1)d = 30 \\ \\ a + 5d =30.....(1)[/tex]
[tex]S _{n} = \frac{n}{2} [ 2a + (n - 1)d] \\ \\S _{11} = \frac{11}{2} [ 2a + (11 - 1)d] \\ \\S _{11} = \frac{11}{2} [ 2a + 10d] \\ \\ S _{11}= \frac{11 \times 2}{2} (a + 5d) \\ \\ S _{11}= 11 \times 30 \\ \\ S _{11} = 330[/tex]