Math, asked by amarja98, 11 months ago

101,99,97......47 find no. of terms in a. p.​

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Answered by avinashroy86
1

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Answered by Anonymous
3

\textbf{\underline {Answer  : 28 terms :}}

a = 101 \\ d = s2 - s1(99 - 101 ) \\  =  - 2 \\ an = 47 \\ n = find \\  \\ an = a + (n - 1)d \\ 47 = 101(n - 1) - 2 \\   \\ 47 - 101(n - 1)2 \\    - 54 = (n - 1) - 2 \\  \frac{ - 54}{ - 2}  = 27 \\ 27 = n - 1 \\ 27 + 1 = n \\ 27 = n \\    n = 27

\textbf{\underline {\underline {Number of A.p is 28:}}}

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