Question

AP with TN=5n+2 find S10​

Answer 1

Step-by-step explanation:

T {1} = 5×1 +2

= 7 = a { 1 }

T{2} = 5×2 +2

= 12

a { 2} = 12 -7

=5

12,5 ....... are in ap

S { 10 } = 5 { 24 + 9×-7 }

= 5 { 24 -63 }

= -5× 39 = -195