Question

Let 3 +4 +8+9+13 + 14 + 18+ ... 40 terms = S. If S = (102)m, then m=
(A) 20
(B) 25
(C) 10
(D) 5​

Answer 1

Answer:

25 is the answer of your questions

Answer 2

Answer:

Correct option (A)

Step-by-step explanation:

S=3+4+8+9+13+14+18+19+....40 terms  = 7+17+27+37+...20 terms

it is in A.P

∴s=  20/2  [2×7+(20−1)10]  

= 10(14+190)

=10×204

=20×102

as s=(102)m

⇒20×102=102×m

m=20