Question

Find the 25th term of an AP , 10, 7, 4, 1………….

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Answer 1

Answer:

25th term of the given AP is -62

Answer 2

Answer:-

• first term (a)=10
• common difference (d)=7-10=-3
• n th term is 25

Formula used,

$\tt \huge \: a_n = a + (n - 1)d \\ \\ \tt \huge \: a_{25} =10 + (25 - 1)</u></strong><strong><u>-</u></strong><strong><u>3</u></strong><strong><u>\\ \\ \tt \huge \: a_{25} =10 + 24(3) \\ \\ \tt \huge \: a_{25} =10 </u></strong><strong><u>-</u></strong><strong><u> 72 \\ \\ \tt \huge \: a_{25} =</u></strong><strong><u>-</u></strong><strong><u>6</u></strong><strong><u>2 \\ \\ \bf \huge \red {25 \: th \: term \: \: is \: </u></strong><strong><u>-</u></strong><strong><u>6</u></strong><strong><u>2}$