Question

Decontre os termos da PA (3,7,11,15)

A)12 termo
B)30 termo
C)50 termo
D)100 termo
E) 22 termo
F)34 termo
G)43 termo
H) 77 termo

Answer 1

(3, 7, 11, 15, ...)

a₁ = 3

r = 7 - 3 ----- r = 4

a)  a₁₂ = 3 + (12 - 1) . 4 ---- a₁₂ = 3 + 44 ---- a₁₂ = 47

b) a₃₀ = 3 + (30 - 1) . 4 ----- a₃₀ = 3 + 116 ----- a₃₀ = 119

c) a₅₀ = 3 + (50 - 1) . 4 ---- a₅₀ = 3 + 196 ---- a₅₀ = 199

d) a₁₀₀ = 3 + (100 - 1) . 4 ---- a₁₀₀ = 3 + 396 ----- a₁₀₀ = 399

e) a₂₂ = 3 + (22 - 1) . 4 ---- a₂₂ = 3 + 84 ---- a₂₂ = 87

f) a₃₄ = 3 + (34 - 1) . 4 ----- a₃₄ = 3 + 132 ----- a₃₄ = 135

g) a₄₃ = 3 + (43 - 1) . 4 ----- a₄₃ = 3 + 168 ----- a₄₃ = 171

h) a₇₇ = 3 + (77 - 1) . 4 --- a₇₇ = 3 + 304 ---- a₇₇ = 307

Creio que seja isso.