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Find the sum of first 25 …

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Find the sum of first 25 terms of an AP whose nth term is given by ax=3x+2
  • 4 answers

Ram Kushwah 6 years, 10 months ago

ax=3x+2

a1=a=3(1)+2=5

a2=a+d=3(2)+2=8

5+d=8-, d=3

S25=25/2(10+24x3)

=25/2(10+72)=25/2 x 82=25x41=1025

 

Honey ? 6 years, 10 months ago

a,d,n, mil jaye toh sum wala formula mein put karo

Honey ? 6 years, 10 months ago

First put x=1 usse a1 aayega phir x=2put karna usse a2 aayega aur phir d nikal lena.

Honey ? 6 years, 10 months ago

1025
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