Answer:i think 2
Step-by-step explanation:
7 and 2 cannot be the lengths as on a triangle they're two equal side so two 3s or two 5s
The sequence is defined as
an = 3an - 1 + 7
This means that
a2 = 3(a(2 - 1) + 7
a2 = 3a1 + 7
From the information given ,
a1 = - 4
Thus,
a2 = 3 * - 4 + 7 = - 12 + 7
a2 = - 5
a3 = 3(a(3 - 1) + 7
a3 = 3a2 + 7
a3 = 3 * - 5 + 7 = - 15 + 7
a3 = - 8
a4 = 3(a(4 - 1) + 7
a4 = 3a3 + 7
a4 = 3 * - 8 + 7 = - 24 + 7
a4 = - 17
Thus, the first four terms of the sequence are
- 4, - 5, -
Answer:
Step-by-step explanation:
did u ever hear of the FOIL method ?
First, outside, inside, last
(5x + 2)(x + 1)
FIRST: multiply the first terms in each set : 5x * x = 5x^2
OUTSIDE: multiply outside terms in each set : 5x * 1 = 5x
INSIDE:multiply inside terms in each set: 2 * x = 2x
LAST: multiply last terms in each set: 2 * 1 = 2
so we now have : 5x^2 + 5x + 2x + 2....combine like terms
5x^2 + 7x + 2 <== ur answer