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The nth term of an AP …

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The nth term of an AP is given by - 4n+15 . find first 20 terms of these AP.

Posted by ????? ❤️ 6 years, 11 months ago

CBSE > Class 10 > Mathematics

6 answers

????? ❤️ 6 years, 11 months ago

Ek or question h

????? ❤️ 6 years, 11 months ago

Thnks kabir ji

Gurjar Kabir (बैंसला) 6 years, 11 months ago

Sorry first 20 terms are 11,7,3,-1,-5,-9,-13,-17,-21,-25,-29,-33,-37,-41, -45,-49,-53,-57,-61,-65...

Gurjar Kabir (बैंसला) 6 years, 11 months ago

Put n=1,2,3 In -4n+15 A1 = -4*1+15 =11 A2. =-4*2+15=7. A3 =-4*3+15 =3. D= A2 - A1 D= 7 -11 =-4 A20. = A1 + 19D = 11+(19*-4) = 11-76 -65....

????? ❤️ 6 years, 11 months ago

Solution pls

Gurjar Kabir (बैंसला) 6 years, 11 months ago

-65....

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