Giải phương trình : 8cos 4 x – 4cos2x + sin4x – 4 = 0
1 answer:
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Answer:
see explanation
Step-by-step explanation:
Given the n th term formula.
To find the first 3 terms substitute n = 1, 2, 3 into the formula
(a)
= (3 × 1) + 2 = 3 + 2 = 5
= (3 × 2) + 2 = 6 + 2 = 8
= (3 × 3) + 2 = 9 + 2 = 11
The first three terms are 5, 8, 11
(b)
Substitute n = 10 into the formula
= (3 × 10) + 2 = 30 + 2 = 32
The tenth term is 32