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प्रश्न
Find:
the 9th term of the AP `3/4 , 5/4 , 7/4 , 9/4 ,.........`
उत्तर
The given AP is `3/4 , 5/4 , 7/4 , 9/4 ,.........`
First term,` a= 3/4`
Common difference `d = 5/4 - 3/4 = 2/4 = 1/2`
nth term of the AP ` a_n = a + (n-1) d = 3/4 + (n-1) xx (1/2)`
∴ 9th termof the AP `a_9 = 3/4 + (9-1) xx 1/2 = 3/4 + 4= 19/4`
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