jezeli sredna arytmetyczna liczb √7 i b jest rowna √3 to ile jest rowne b?
(√7 + b)/2 = pierw. z 3
√7 + b = 2√3
b = 2√3 - √7
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(√7 + b)/2 = pierw. z 3
√7 + b = 2√3
b = 2√3 - √7