Math, asked by deepakjoshickm, 10 hours ago

find the sum of the 25 terms of the AP 2,4,8​

Answers

Answered by ajay8949
1

 \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf {a = 2}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf{d = 4 - 2 = > \boxed{  2}}

 \red {\boxed {\:  \:  \:  \:  \:  \sf \green{ \binom{s}{ \:  \:  \: n}  =  \frac{n}{2} (2a + (n - 1)d)} \:  \:  \:  \:  \: }}

⇢  \sf{\binom{s}{ \:  \:  \: 25}  =  \frac{25}{2} (2(2) + (25 - 1)2)}

⇢   \sf{\binom{s}{ \:  \:  \: 25}  =  \frac{25}{2} (4 + 48)}

⇢  \: \sf{  \binom{s}{ \:  \:  \: 25}  =  \frac{25}{ \cancel{2}}  \times  \cancel{52}}

⇢  \:  \sf{ \binom{s}{ \:  \:  \: 25}   = 25 \times 26}

⇢  \: \:  \sf{\binom{s}{ \:  \:  \: 25}  =65 0}

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