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Meeta

· started a discussion

· 1 Months ago

cube can not satisfy the square root (Question: 77497.0 )

Please check the questions again.

Question:
DIRECTIONS: What should come in the place of question mark (?) in the following questions? /  निम्नलिखित प्रश्नों में प्रश्नवाचक चिन्ह (?) के स्थान पर क्या आना चाहिए?
\(\sqrt[]{(1331)^{\frac{1}{3}}-(343)^{\frac{1}{3}}}\)     = ?
Options:
A) 2
B) 5
C) 4
D) 3
E) 7
Solution:
Ans: (a) let/ माना  ? = x
\(x=\sqrt[]{(1331)^{\frac{1}{3}}-(343)^{\frac{1}{3}}}\)
\(x=\sqrt[]{(11^3)^{\frac{1}{3}}-(7^3)^{\frac{1}{3}}}\)
\(x=\sqrt[]{11-7}\)
\(x=\sqrt[]{4}\)
x = 2

kanhaiya jha

· commented

· 1 Months ago

please see again...its 1/3...

Meeta

· commented

· 1 Months ago

but it is showing 1/2 not 1/3 in question.

kanhaiya jha

· commented

· 1 Months ago

let ? = x
x={√(1331)}^(1/3) − {√(343)}^(1/3)
x=(11^3)^(1/3)−(7^3)^(1/3)
x=√(11-7)
x=√4
x = 2
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