1. Oblicz wartość wyrażenia z dokładnościądo 0,1.
2. Oblicz:
w zalączniku
1.
- I -4√28 + 3√63 - 2√7 I =
= - I - 4√(4·7) + 3√(9·7) - 2√7 I =
= - I -4·√4·√7 + 3·√9·√7 - 2√7 I =
= - I-4·2√7 + 3·3√7 - 2√7 I =
= - I -8√7 + 9√7 - 2√7 I =
= - I -√7 I =
= -√7 =
= -2,6
2.
√(5²·2⁴ + 2⁴·12²) = √((2⁴(5²+12²)) = √((16(25+144)) = √(16·169) = √16·√169 = 4·13 = 52
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w zalączniku
1.
- I -4√28 + 3√63 - 2√7 I =
= - I - 4√(4·7) + 3√(9·7) - 2√7 I =
= - I -4·√4·√7 + 3·√9·√7 - 2√7 I =
= - I-4·2√7 + 3·3√7 - 2√7 I =
= - I -8√7 + 9√7 - 2√7 I =
= - I -√7 I =
= -√7 =
= -2,6
2.
√(5²·2⁴ + 2⁴·12²) = √((2⁴(5²+12²)) = √((16(25+144)) = √(16·169) = √16·√169 = 4·13 = 52